Dimethylation
二甲基化作用, 二甲基取代作用
🗣️ 情景例句
Twenty-one inches.
二十一英尺。
One party is entitled to cancel the contract if the other side cannot execute it.
如果一方不履行合同，另一方有权取消合同。
The village no longer existed because it had been submerged, and all the valley too.
村庄已不复存在，因为已经为水所淹，山谷也被水淹没了。