O. b.
[医] 产科学
🧩 词语组成解析
[医] O型, 菌体型, 不动型(细菌)
🗣️ 情景例句
What time?
什么时候
The doctor said I looked pale and tired.
医生说我看起来苍白和疲倦。
Mum or dad, of course, provide a regular supply of pocket money, but uncles and ants are always a source of extra income.
爸爸妈妈当然经常给孩子零花钱，但是，叔舅婶姨也是孩子们额外收入来源。