咳嗽时用纸巾捂住口鼻: cover your nose and mouth with a tissue when sneezing or cough-ing
久: Ⅰ形容词(时间长) for a long time; long 短语和例子很久以前 long ago; 久经考验的战士 a long-tested fighter; 天长日久 after a considerable period of time; 让你等的时间久吗? have you been waiting long? 对不起, 让你久等了。 sorry to have
