Ifo
abbr. 已识别的飞行物（identified flying object）
🗣️ 情景例句
You should consider his proposal.
你该仔细考虑他的建议。
I meet the boy whose aunt is a stenographer.
我遇到那个男孩的姑妈是速记员。
We all know what the poor man should have said,
我们都明白那个可怜的人应该说些什么，