To test the theory, the scientists recreated what ancient tool makers might have done by heating a pile of silcrete stone in a fire pit.

为了检验这个理论，科学家们通过在一个火坑里加热砾岩石，重现了远古工匠们可能的做法。

youdao

The first F-35B short takeoff/vertical landing stealth fighter operates in vertical-landing mode on a special "hover pit" at Lockheed Martin in Fort Worth, Texas, during an April test.

4月，洛克希德·马丁公司沃斯堡工厂的“悬停坑”对首架短距/垂直起降F-35B隐形战斗机的垂直着陆方式进行测试试验。

youdao

The model test aimed to study hydraulic characteristics of buffer pit ballast discharge after rock clog in deep water was blasted.

试验对深水岩塞爆破后缓冲坑泄渣的水力特性进行了研究。

youdao

Your stomach sinks, you have that sinking feeling in the pit of your stomach, when you get a bad grade on a test.

当你考试考砸的时候,你的胃会垂下去,或者说,会有胃部下垂的感觉

耶鲁公开课 - 死亡课程节选

When ignited in a test pit the rocket, called the B4, produced a thrust of about a quarter of a tonne and behaved exactly as predicted.

BBC: Hybrid success for British rocket

The pit simulation, Karutz explained, can be used to test the degree to which cognitive knowledge in this case, the knowledge that the floor does not contain a pit is capable of overriding gut instincts and fear.

NEWYORKER: The Visionary