Saltpetrous
硝石的
✅ 同义词
🗣️ 情景例句
What are you talking about?
你在说什么呀？
I learned geography last week.
我上星期学地理。
many of them serious and senior scientists---- who dream of sending people to it.
其中的不少人是认真和资深的科学家，他们一直梦想着把人送上火星。