Derivativeness
可微商性, 可微商情况
🗣️ 情景例句
The climate here is always hot, summer and winter alike.
这里的气候总是那么热，夏季与冬季都一样。
To run for freedom
为求自由而逃跑
But the historian attempting to reconstruct the distant past is always faced with a difficult task.
但是，历史学家企图重现遥远的过去可是一项艰巨的任务，