在一个关注碳足迹的时代，我们能了解到轻塑料的制造和运输比起其他原材料耗费更少的能量。

And in an era when we're concerned about our carbon footprint, we can appreciate that lightweight plastics take less energy to produce and transport than many other materials.

youdao

在那个时代，一千磅的金属材料是一笔数额巨大的财富，耗费这么多的材料用来埋葬是相当不寻常的。

A thousand pounds of metal is an enormous amount of wealth in this era. To waste so much of it in a burial is pretty unusual.

youdao

但是制造一个换能器需要利用微机械技术，在一块质地脆硬的陶瓷材料上精心加工，耗费数个小时才能完成。

To make a transducer by painstakingly micro-machining a brittle block of ceramic material can take many hours of work, though.

youdao