Ifo
abbr. 已识别的飞行物（identified flying object）
🗣️ 情景例句
At today's exercise class...
今天上健身课的时候……
He's very fond of playing tennis.
他非常喜欢打网球。
Vipers (adders) and rattlesnakes manufacture the blood poison, which is known as haemolytic.
蝰蛇（蝮蛇）和响尾蛇产生血液毒素，称为溶血性毒液。