Pentafluoride
五氟化物
🗣️ 情景例句
Do you still live there?
你现在还住那儿吗？
You must be hungry. Shall we get something to eat?
你一定饿了，我们吃点东西好吗？
It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.
据估计，在英国蜘蛛一年里所消灭昆虫的重量超过这个国家人口的总重量。