Ulvite
方钛铁矿
🗣️ 情景例句
She is making steady progress in her learning.
她在学习中不断进步。
So they are content to let him go to America.
所以他们满意地让他去美国了。
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人类自夸的“征服”了空气的发动机。