Wigwags
vi. 摇摆；用旗语发信号；用手示意\\nvt. 使摆动；用旗语发送\\nn. 用旗语发送的信号
🗣️ 情景例句
I happened to meet her on the bus.
我凑巧在公共汽车上碰见她。
Parents usually put a small red paper packet under their child's pillow.
父母常常会在孩子枕头下放一个小红包。
As soon as I tap on the window, you must stop within five feet.
我一敲车窗，你必须把车停在5英尺之内。