Monoerg
同種抗原抗血清, 單應性抗血清
??? 情景例句
He's so funny.
他喜歡開玩笑。
I can't remember what John was doing yesterday afternoon.
我不能記得約翰昨天下午正在做的東西。
But I'm learning to skate. What's the weather like in Australia?
不過我正在學溜冰。澳大利亞天氣怎樣？