在病毒进入一个人的鼻或口之后流感发作。
Influenza develops after the virus enters a person's nose or mouth.
咳嗽和打喷嚏的时候用纸巾掩盖口鼻。
Cover your mouth and nose with a tissue when coughing or sneezing.
他抓住狗的口鼻，把它逮住了。
保持良好的个人卫生习惯，打喷嚏或咳嗽时应掩口鼻。
Keep good personal hygienic habit and cover the mouth and nose while sneezing or coughing.
保持良好的个人卫生习惯，打喷嚏或咳嗽时应掩口鼻。
Keep good personal hygienic habit and cover the mouth and nose while sneezing or coughing.
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