Oab
abbr. obligate anaerobic bacteria 专性厌氧菌; one-to-all broadcast 一点对所有点广播; O-acetyl benzaldehyde O-乙酰苯甲醛; O-aminobenzoate O-氨基苯甲酸酯
🗣️ 情景例句
but my work keeps me busy.
但我老是忙于工作。
I want to extend my warmest welcome to all of you.
热烈欢迎大家。
What is more, this information line operates 24 hours a day.
而且，这种"问讯线路每天工作24小时。