双语例句

上海419论坛　　1.Are there any classes I could observe?

上海419论坛　　有我可以观摩的课吗？

上海419论坛　　2.Imposing 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。

　　3.They were careful to observe the proprieties.

　　他们恪守规矩。

上海419论坛　　4.They observed him entering the bank.

上海419论坛　　他们看见他走进银行。