Megarad
n. [核]兆拉德(吸收劑量的標(biāo)準(zhǔn)單位)
??? 情景例句
Don't be lazy, the older you get, the harder it will be to learn.
別偷懶，年紀(jì)越大，學(xué)起來(lái)就越難。
Every dog has his day.
凡人都有得意之日。
Is it expensive to hire a car?
租車(chē)貴不貴？