Eurypteroid
板足鲎
🗣️ 情景例句
I can't wait to tell Marilyn!
我迫不及待地想告诉Marilyn。
Martha will expect you to come by at six o'clock for dinner.
玛莎以为你在六点以前会来吃晚饭。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。