Undercoverage
总量差额
🗣️ 情景例句
My mother has a touch of the flu.
我妈得流感了。
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
He asked if Mr.Gilbert's operation had been successful and the doctor told him that it had been.
他问吉尔伯特先生的手术中否成功，医生告诉他手术很成功。