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。
