例句:
1、He does not paint for very long on any one painting, perhaps for two and a half hours at a time.
他每幅画不会画很长时间，一次大概画两个半小时。
2、The meeting will last two and a half hours.
会议有可能开两个半小时。
3、I only knew him for two and a half hours.
我认识他仅两个半小时。
4、We drove two and a half hours to get there.
我们开了两个半小时到那里。
5、I worked without a break for two and a half hours.
我一口气工作了两个半小时，没有休息。
6、We have two and a half hours.
还有两个半小时。
7、That was probably only two and a half hours into the climb.
大概发生在最后攀登开始的两个半小时左右。
8、The family reunion was supposed to last nearly two and a half hours.
家庭重聚本该是要有将近两个半小时的。
