当金属浇入时，泡沫材料蒸发，金属取代其位置。

As the metal is poured, the foam vaporizes, and the metal takes its place.

youdao

我们这里在说的是新石器时代，是石器开始被青铜和其他金属制工具所取代之前的那个时代。

We are talking about the Neolithic period here, which was the time before stone tools began to be replaced by tools made of bronze and other metals.

youdao

简单来说，美人奴跨界敞篷车就是一款四轮驱动的美人奴跨界车，只是用自动折叠的软顶取代了金属的硬顶，而且取消了两个后方车门。

In simple terms, the Murano CrossCabriolet is an all-wheel-drive Murano crossover in which an automatic folding fabric top replaces the metal roof, and the two rear doors have been eliminated.

youdao

Lastly, up here, is a picture of a much smaller device, this is actually an artificial heart valve that is made of plastics and metal and can replace the valve inside your heart.

最后,在上面这里,这张图片是一个相对较小的装置,这实际上是一个人工心脏瓣膜,由塑料和金属制成,可以取代人的心脏瓣膜

耶鲁公开课 - 生物医学工程探索课程节选