参加会议的欧洲学者讲讨论一些新的预报服务，来辨别一些此前没有过的细节，分析这些喷雾状物从哪里来又会到哪里去。
European researchers also attending the conference will discuss a new forecasting service that will identify in unprecedented detail where these aerosols are coming from and where they are going.
从前,有三个自以为医术都学到家了的军医在各地旅行.一天晚上,他们来到一家旅店.旅店老板问他们从哪里来,到哪里去?
There were once three army-surgeons who reckoned that they had nothing more to learn about the art of surgery. They were on their travels., and stopped for the night at an inn.
我知道我从哪里来，我知道我要到哪里去。
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