Nuclear substitution
[化] 环上取代; 环上取代作用
🧩 词语组成解析
substitution
[ˌsʌbsti'tju:ʃən]
n. 代替;代用;替换;<化>取代（作用）;
🗣️ 情景例句
Oh, I'm so happy, Harry!
噢， 我太高兴了， Harry！
Those who climb high often have a fall.
爬得高往往跌得重。
at any rate for short periods -- that running, jumping and kicking a ball are tests of national virtue.
至少在短期内如此 -- 跑跑、跳跳、踢踢球是对一个民族品德素质的检验。