ball bearing

音標發(fā)音

In this tutorial, you will learn how to create a ball bearing using an Array Object.
在本教程中，您將學習如何創(chuàng)建一個使用數(shù)組對象的球軸承。
The critical velocity of the Karo syrup would be 100 miles per hour for a quarter-inch ball bearing.
滾珠的臨界速度,是每小時100英裡,低得多。
Labyrinth: a game involving tilting a maze to negotiate a ball bearing to the \\\'finish\\\' position while avoiding traps (holes in the board). This tested motor performance.
迷宮：這個遊戯要求擺弄一個迷宮以使一顆滾珠到達‘最終目的地’，同時要繞過板上的洞，這裡測試的是動覺能力。

These are relatively small pieces of the earth's crust that, when caught between two larger plates, spin around as the larger plates move—like a ball-bearing caught between two surfaces.
ECONOMIST: Geophysics

a small metal ball or several of these arranged in a ring to make particular parts of a machine move more easily

Ball bearings are small metal balls placed between the moving parts of a machine to make the parts move smoothly.