🧩 词语组成解析
n. 除尘器, 撒粉器
🗣️ 情景例句
Time heals all sorrows.
时间会治愈一切悲哀的。
Which of your arms is sore?
你哪个手臂酸呀？
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。