Schertalite
磷铵镁石
🗣️ 情景例句
Beijing Hotel.
北京饭店。
Friends are lost by calling often and calling seldom.
交往过密过疏，都会失去朋友。
Spiders are busy for at least half the year in killing insects.
蜘蛛至少有半年在忙于吃昆虫。