Pentachloroethane
五氯乙烷
🗣️ 情景例句
Tell me all about your interests, your hobbies ...
告诉我你所有的兴趣和爱好。
I'm hoping to spend a few days in the mountains.
我正在希望到在山上过一些天。
but each year, the dogs are still sent out into the snow whenever a traveller is in difficulty.
但每年还要派狗到雪山地里去帮助那些遇到困难的旅游者，