Allelotropy
等位基因現象
??? 情景例句
Why was she working anyway? She's rich.
真弄不懂她當初為什么要工作。她是有錢人呀。
But wouldn't you like to spend an extra day or two here?
你們不愿意在北京多待一天嗎？
Good morning, sir.
先生，早上好。