“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.