You can try tapping your fingers on the desk or the chairs arm-rest. This is a typical sign of someone getting impatient or irritated with work. 你可以试着用手指敲桌子或椅子扶手,做这个典型的标志性动作代表你对工作到了失去耐心到了无法容忍的地步。
Top and bottom originally machine please use arm-rest. 上下本机时请使用扶手。