Ulitis
龈炎
🗣️ 情景例句
I am sorry. I am not free right now.
对不起，我现在很忙。
He who pleased everybody died before he was born.
众口难调。
A robot-arm from the Endeavour will grab the telescope and hold it while the astronauts make the necessary repairs.
当宇航员进行必要的修复工作时，“奋进”号上的一只机器手将抓住望远镜并托住它。