Elementary reaction
[化] 元反应
🧩 词语组成解析
🗣️ 情景例句
Don't forget Susan.
别忘了Susan。
He always comes rushing up at the last moment.
他往往到最后的一瞬间才急忙赶来。
Hardly anyone can positively enjoy sitting in a train for more than a few hours.
很少有人能够真正喜欢坐几个小时以上的火车。