Lithothamnion
石枝藻属
🗣️ 情景例句
when I said we couldn't ask for anything more.
在我说我们再没什么可求的了的时候。
No one can call back yesterday.
往日不复返。
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。