Selfpropelled
自行的
🗣️ 情景例句
We promise. Can we pay for our imports in RMB?
我们答应。请问，我们能否用人民币付款？
I'm not really sure about that. Mr. Jiang should know the answer to that.
关于那事我不敢确定，蒋先生应该知道答案。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，