When there's a fire, follow the teachers' instructions, leave the classroom quickly and use a piece of cloth to cover your mouth and nose so that you don't breathe in smoke.
发生火灾时，按照老师的指示，迅速离开教室，用一块布遮住口鼻，以免吸入烟雾。
She said, "the best way to experience opera is to see it on the stage, and the best way to use word of mouth is to put a referral marketing plan in place."
她说，“最好的体验歌剧的方法是在舞台上，最好的采用口碑营销的方法是提出一个适当的推荐营销计划。”
The equivalent of a blanket in the human experiment was a ball held in the mouth of a dog which was being observed (dogs often use their mouths to manipulate things).
人类实验中的毛毯的等效物是狗嘴中叼的球，旁观者可以看得见(犬类往往用嘴来操纵物品)。
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