Natrometer
测钠计, 钠量计
🗣️ 情景例句
Hi, Marilyn. I hope it's not too late.
你好， Marilyn， 我希望我来得不算太晚。
Let me give you an indication.
我可以提示一个想法。
Since its discovery, it has become a sort of potholers' Everest.
自从被发现以后，这个洞成了洞穴探险者的珠穆朗玛峰，