“投入”造句

各企业需要更好地培训工人，并且在研发方面加大投入。
Businesses need to train their workers better, and spend more on R&D.

该设备几个月之前曾投入运行。
The device had been used operationally some months previously.

他停下来，饶有兴趣地看着孩子如此投入。
He stopped and watched with amusement to see the child so absorbed.

• #投入