Protocols
n. 协议；礼仪礼节；条款（protocol的复数）
🗣️ 情景例句
I'd like to give thanks for Grandpa coming to live with us.
我感谢爷爷到这儿和我们一起生活。
Mutual understanding.
心照不宣。
The girl in red is his girlfriend.
穿红衣服的那个女孩是他的女朋友。