Plumballophane
铅铝英石
🗣️ 情景例句
Yes?
是吗？
To worry about tomorrow is to be unhappy today.
担心明天，今天就不愉快了。
The old view of Galileo was delightfully uncomplicated.
令人高兴的是，过去对伽利略的看法并不复杂。