Electron pqir bond
[机] 见covalent bond
🧩 词语组成解析
electron
[i'lektrɔn]
n. 电子;
🗣️ 情景例句
What time does the library close?
图书馆什么时候闭馆？
Hope springs eternal (in the human breast).
希望会产生，永远无穷尽。
However, in recent times the old-age pension has only been paid to the poorest people because there has been an increase in the number of people out of work.189
然而阳近一段时间，老年养老金只付给那些最穷的人，因为失业的人数一直在增长。