In the empty jar place several steel ball bearings.

在空罐子里放着几个钢球。

Small things. Peas, ball bearings, dimes.

小东西。 豆子、滚珠、一角钱。

He points to a computer file that instructs 3D printers to make a plastic encasement full of ball bearings.

他指着一个计算机文件，该文件指示 3D 打印机制作一个装满滚珠塑料外壳。

As a coating on raincoats, industrial ball bearings, artificial joints, circuit boards, and even the Rocky Mountains-themed roof of the Denver International Airport.

雨衣上防水层，工业球支座，工关节，电线板，甚至是丹佛国际机场落基山脉主题屋。

In this test, the ball bearing penetrated the skin, piercing the liver, and travelling all the way through the rest of the body...

在此测试中， 滚珠穿透皮肤， 刺穿肝脏， 并一路穿过身体其余部. . . . . .

More recent archaeological hypotheses have them transporting the bluestones with supersized wicker baskets on a combination of ball bearings and long grooved planks, hauled by oxen.

最近考古假设认为，他们用滚珠和长槽木板组合而成超大柳条篮运输青石，并由牛拉动。

It's like a V-shaped trench. I'm imagining like there's a ball bearing, and it's like, and it can only go forward in that trench or back. And it goes forward. - Right.

就像是 V 字形沟壑。我想象着有一个滚珠，它只能在沟里前进或后退。它向前走。- 对。