Sif
abbr. selective identification feature 选择识别特征
🗣️ 情景例句
Well, I ...
好啦， 我……
My cousin is a member of a flying club, He seem private flying.
我的表兄是一个飞行俱乐部成员，他似乎很喜欢飞行。
There is a journalist and writer living in America whose name is Alex Haley.
有一位住在美国的记者兼作家，名叫亚历克斯·哈利。