Prebeveling
预开坡口
🗣️ 情景例句
Where did this money come from?
这些钱从哪来？
Is this yours?
这是你的吗？
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.
某些大公司进行的研究属于一般和基础性的研究。因此不保密对他们才有利。