如果您在解释程序时听众点头,请叫醒他。
If a listener nods his head when you're explaining your program, wake him up.
To signal an emergency, use the rule of three; 3 shouts, 3 horn blasts, or 3 whistles.
技术本身没有好坏,关键看你怎么用它。
From 30 feet away she looked like a lot of class. From 10 feet away she looked like something made up to be seen from 30 feet away.