invention是可数还是不可数？

invention既可以是可数也可以是不可数，根据实际意思来确定

例句

1.

Such changes have not been seen since the invention of the printing press.

自从发明了印刷机，这种变革还没有出现过。

2.

The invention of the industrial robot is credited to the company.

工业机器人的发明应归功于那家公司。

顶一下

(0)

0%

踩一下

(0)

0%