Monosubstituted
[医] 一原子置换的, 单基置换的
🗣️ 情景例句
Grandpa, get the net, please!
爷爷 ，请把网子拿来！
Just made it.
末班车。
He explained that he had tried to fix the air-line to the supply line that ran round the port but could not because the fittings did not match.
他解释说他想供气管安装到铺设在码头周围的供应管上，但因为接头不相配而接不上。