Centron
原子核
🗣️ 情景例句
I am calling for the A company.
我是代表A公司打电话来的。
I'm glad to hear about your new job.
我很高兴得知你获得了新工作。
Thus the rods, by falling, and by the direction in which they fell,
木棒倒下的多少和倒下的方向