Guanidyl
(=guanidino-)胍基
🗣️ 情景例句
These are polite questions.
这些问题都是礼貌的。
It is not every couple that is a pair.
成双并非皆配偶。
I left the bag in the hall and Robert and I went into the living room where we talked for a couple of hours.
我把纸袋放在门厅里，与罗伯特一起进了起居室，在那里聊了好几个钟头。