Ert
abbr. 雌激素替換療法（estrogen replacement therapy）
??? 情景例句
I know, Grandpa.
我知道 ，爺爺。
He that would have eggs must endure the cackling of hens.
欲圖逸，得先勞。
One evening, however, he failed to arrive.
可是，有一天晚上，它出去后再也沒回來(lái)。