Tdf
[医][=t-cell derived factor]t细胞衍生因子
🗣️ 情景例句
Don't ask why; just do as you are told.
别问为什么， 按要求去做就行了。
What's your nationality?
你是什么国籍？
An old watch, by contrast,
然而一只老掉牙的手表，