Flynut
蝶形螺母
🗣️ 情景例句
but I think I can be of some help to you.
但我觉得我可以对你略有帮助。
I will be very glad when I receive the letter.
如能接到你的来信，我将会非常高兴。
What happened before printing was invented?
印刷术发明以前是怎么一回事？