Retropulsion
n. 后退\\n[医] 后退, 后退步态, 后冲步态
🗣️ 情景例句
Study hard and study everyday, if you want to master the English language.
如果你想精通英语的话，就得每天刻苦学习。
How long will I have to wait?
我要等候多久呢？
His telescopic observations are justly immortal;
伽利略用望远镜所作的观察确实是不朽的，