Agnatha
n. 無顎類脊椎動物
??? 情景例句
What is your cancellation policy?
我怎么退票？
Come in and make yourself at home.
請進(jìn)，別客氣。
Take it easy, you will be all right in a couple of days.
別擔(dān)心，你兩天之內(nèi)就會痊愈的。