Differentiating
[计] 微分的
🗣️ 情景例句
from his new book entitled Family Album, U.S.A.
从他的新书Family Album, U.S.A.
Be my guest.
别客气。
Officials from Greenwich Observatory have the clock checked twice a day.
格林尼治天文台的官员们每天两次派人矫正此钟。