Sif
abbr. selective identification feature 选择识别特征
🗣️ 情景例句
And perhaps, you'll join us?
也许你能跟我们一起去
A cheerful wife is the joy of life.
快乐的妻子是生活的乐事。
It 'flies', therefore, but it cannot fly higher---
这样，船就能飞了，但飞不高。