Rammel
松石
🗣️ 情景例句
I sure I am glad to see you, Dr. Stewart.
真高兴见到你来 ，Stewart大夫。
What time should I be at the departure gate?
我在什么时间到登机门？
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，