Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
The old library building on Chestnut Street,
Chestnut街老图书馆，
Those who climb high often have a fall.
爬得高往往跌得重。
His bike hit the bag of rice and he fell off.
他的车撞到大米上，他摔了下来。