Aromatic substitution
[机] 芳(香)族取
🧩 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
Always remember to wash your hands before eating.
用餐前谨记要洗手。
Insecticides destroy many harmful bugs.
杀虫剂能驱除许多害虫。
as the wave leaves the particles behind back to its starting point again.
当波浪把微粒留在身后时又回到出发点。