Hydrogen cycle
[机] 氢循环
🧩 词语组成解析
cycle
['saɪkl]
n. 循环，周期;自行车;时代，一段时间;整套;
vi. 周而复始，循环;骑自行车;轮转;
vt. 运转，循环;使轮转;
cycl =ring,circle,表示”圆,环”
🗣️ 情景例句
Make yourself at home.
勿客气。
I have come to make sure that your stay in Beijing is a pleasant one.
我特地为你们安排使你们在北京的逗留愉快。
Traditional custom, taken the world over,
从世界范围来看，传统风俗