🗣️ 情景例句
How much for a one-way ticket to New York?
去纽约的单程票多少钱？
If he doesn't take care of him, I will.
如果他不，我将照顾他。
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。