observe的名词形式

双语例句

there any classes I could observe?

有我可以观摩的课吗？

sing speed restrictions is easy, but forcing motorists to observe them is trickier

限制车速容易，但强制司机遵守这些限速规定就难办多了。

were careful to observe the proprieties.

他们恪守规矩。

observed him entering the bank.

他们看见他走进银行。