英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

velocities    音标拼音: [vəl'ɑsətiz]
Velocity \Ve*loc"i*ty\, n.; pl. {Velocities}. [L. velocitas,
from velox, -ocis, swift, quick; perhaps akin to volare to
fly (see {Volatile}): cf. F. v['e]locit['e].]
[1913 Webster]
1. Quickness of motion; swiftness; speed; celerity; rapidity;
as, the velocity of wind; the velocity of a planet or
comet in its orbit or course; the velocity of a cannon
ball; the velocity of light.
[1913 Webster]

Note: In such phrases, velocity is more generally used than
celerity. We apply celerity to animals; as, a horse or
an ostrich runs with celerity; but bodies moving in the
air or in ethereal space move with greater or less
velocity, not celerity. This usage is arbitrary, and
perhaps not universal.
[1913 Webster]

2. (Mech.) Rate of motion; the relation of motion to time,
measured by the number of units of space passed over by a
moving body or point in a unit of time, usually the number
of feet passed over in a second. See the Note under
{Speed}.
[1913 Webster]

{Angular velocity}. See under {Angular}.

{Initial velocity}, the velocity of a moving body at
starting; especially, the velocity of a projectile as it
leaves the mouth of a firearm from which it is discharged.


{Relative velocity}, the velocity with which a body
approaches or recedes from another body, whether both are
moving or only one.

{Uniform velocity}, velocity in which the same number of
units of space are described in each successive unit of
time.

{Variable velocity}, velocity in which the space described
varies from instant to instant, either increasing or
decreasing; -- in the former case called accelerated
velocity, in the latter, retarded velocity; the
acceleration or retardation itself being also either
uniform or variable.

{Virtual velocity}. See under {Virtual}.
[1913 Webster]

Note: In variable velocity, the velocity, strictly, at any
given instant, is the rate of motion at that instant,
and is expressed by the units of space, which, if the
velocity at that instant were continued uniform during
a unit of time, would be described in the unit of time;
thus, the velocity of a falling body at a given instant
is the number of feet which, if the motion which the
body has at that instant were continued uniformly for
one second, it would pass through in the second. The
scientific sense of velocity differs from the popular
sense in being applied to all rates of motion, however
slow, while the latter implies more or less rapidity or
quickness of motion.
[1913 Webster]

Syn: Swiftness; celerity; rapidity; fleetness; speed.
[1913 Webster]


请选择你想看的字典辞典:
单词字典翻译
Velocities查看 Velocities 在百度字典中的解释百度英翻中〔查看〕
Velocities查看 Velocities 在Google字典中的解释Google英翻中〔查看〕
Velocities查看 Velocities 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Google Photos: Edit, Organize, Search, and Backup Your Photos
    Edit and enhance photos with AI-powered features like Magic Editor and Magic Eraser on Google Photos Store, organize search your memories
  • Google Photos
    Stay updated with the latest features and improvements in Google Photos
  • Google Photos
    Home for all your photos and videos, automatically organised and easy to share
  • Google Photos Help
    Official Google Photos Help Center where you can find tips and tutorials on using Google Photos and other answers to frequently asked questions
  • Get started with Google Photos - Computer - Google Photos Help
    Step 1: Open Photos Go to Google Photos If you aren’t signed in to your Google Account, click Go to Google Photos and sign in Step 2: Find your photos When you open Google Photos,
  • Google Photos - Google Accounts
    Home for all your photos and videos, automatically organized and easy to share
  • Google Photos: Backup Edit 4+ - App Store
    ‎Google Photos is a smarter home for all your photos and videos, made for the way you take photos today “The best photo product on Earth” – The Verge “Google Photos is your new essential picture app” – Wired “Upload the pictures, and let Google Photos do the rest” – The New York Times • 15 GB OF C…
  • Download photos or videos to your device - Computer - Google Help
    Download all photos or videos Learn how to export and download your Google Photos data Tips: To move all your photos to a different Google Account, download all your photos and upload
  • 10 tips for 10 years of Google Photos - The Keyword
    Google Photos lets you search for photos using specific descriptions like "me in a sparkly blue dress " Free up phone space by removing backed-up photos; they're still viewable in Google Photos Summaries were generated by Google AI Generative AI is experimental Basic explainer Google Photos is ten years old and has lots of cool features
  • Sign in - Google Accounts - Google Photos
    Use your Google Account Email or phone Forgot email? Type the text you hear or see Not your computer? Use a private browsing window to sign in Learn more about using Guest mode Next





中文字典-英文字典  2005-2009