Chemigraph
化学腐蚀凸板
🗣️ 情景例句
What is the charge for that?
那要多少费用？
Today is the scholar of yesterday.
今天是昨天的学者。
The idea of colonising Mars---- a world 160 times more distant than the Moon----
征服火星的计划-一个比月球远160倍的星球