比如说，我们确定一种颜料由锌制成。

Say we determined a pigment was made with zinc, for example.

youdao

该物由铸铁制成，表面以石墨搪瓷抛光。

Made from cast iron, it is finished in graphite enamel.

《柯林斯英汉双解大词典》

酸奶是由活性培养菌制成的。

Yogurt is made from active cultures.

《牛津词典》

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

The shield itself, as I've told you is made of a heavy wood, covered by a leather or bronze sheet about three feet across, something in the neighborhood of 16 to 20 pounds worth of shield and gripped as I told you before.

而盾牌,就像我说过的,是由沉重的木材制成,上面包裹有皮革或铜皮,约三英尺宽,大概是十六到二十磅重,就像我刚才所说的,拿起来很费劲

耶鲁公开课 - 古希腊历史简介课程节选

You need to do that to be able to control the shield that's as big as that and as heavy as that, because it is made fundamentally of a heavy wood, typically covered by leather, sometimes with some bronze, a bronze sheet across the front of it as well.

如果你想自如操控这块盾牌就必须得这样,这种盾牌很大并且很笨重,因为它主要是由沉重的木材制成,表面一般覆有皮革,或包上铜皮,就是表面上有一层铜皮

耶鲁公开课 - 古希腊历史简介课程节选