Extinct volcano
死火山
🧩 词语组成解析
🗣️ 情景例句
Try to think in English whenever possible.
尽可能用英文思维。
I will try.
我会试试看。
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。