two的副词

　　You should think twice about employing someone you've never met.

　　雇用素不相识的人应三思而行。

　　A comparable house in the south of the city would cost twice as much.

　　一栋类似的房子位于城南部就要贵一倍的价钱。

　　Click the left mouse button twice to highlight the program.

　　双击鼠标左键来加亮突出这个程序。

　　Cats sleep twice as much as people.

　　猫睡觉的时间比人长一倍。

　　I don't know her well, I've only met her once or twice.

　　我跟她不很熟；我只见过她一两次。

　　This room is twice the length of the kitchen.

　　这个房间的长度是厨房的两倍。

　　He's already been reported twice for arriving late.

　　他因为迟到已经两次被告发。

　　The ball bounced twice before he could reach it.

　　球弹了两次他才接到。