例句
英语四级真题
In some countries, whistling by listeners is a sign of approval while in other courtiers it is a form of insult.
出自-2011年12月听力原文
英语六级真题
In some countries, whistling by listeners is a sign of approval while in other courtiers it is a form of insult.
出自-2011年12月听力原文
柯林斯高阶英汉双解学习词典释义