Substitution operation
[计] 替换操作
🧩 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
OK. By the way, tell your wife she throws a successful party.
好。还有，请告诉你夫人，她办了一个很成功的宴会。
Step after step the ladder is ascended.
按部就班，循序渐进。
In the first instance, we would be looking for plant life, rather than 'little green men'.
首先我们要寻找植物，而不是那种“小绿人”。