wave at的用法和樣例：
例句
- He saluted his friend by a wave of the hand.
他揮手向朋友致意。 - We waved good-bye to her at the airport.
我們在機場向她揮手告別。 - With something so important, you can't just wave a wand and presto!
在這麼重大的問題上，你想揮動一下指揮棒，轉眼就變過來，辦不到！ - If violence returns, its people may expect Mr Obama, whose father was Kenyan, to wave his wand.
如果暴亂爆發，肯亞人民可能會期望父親是肯亞人的奧巴馬揮動大棒施以援手。
