Pellosil
二氧化硅
🗣️ 情景例句
I think I know you. Aren't you...?
我觉得我认识你。你是……吗？
Sure.
不用谢，当然了。
we are now pretty certain the Earth is the only one on which life can survive.
我们目前可以肯定的是，地球是生命能存在的唯一行星。