It was only later that she could see the absurdity of the situation.

　　直到后來她才看出了那種局面的荒唐。

　　Once aboard we were soon helpless with laughter at the absurdity of it

　　一上飛機我們就按捺不住，大笑起這事的荒唐。

　　It was a period of intense activity.

　　那是活動激烈的時期。

　　Economic activity often follows a cyclical pattern.

　　經(jīng)濟活動常常遵循周期性模式。

　　He watched for signs of activity in the house.

　　他注視著那所房子里的動靜。