Materialman
n. 材料供给人
🗣️ 情景例句
first thing in the morning.
这是我明天早上的第一件事。
He is very nervous, so he takes a lot of pills.
他非常的神经质，所以要服很多药
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。