Extremals
极值曲线
🗣️ 情景例句
I'm with you there.
我和你想的一样。
He can't come and he sends his apologies.
他为他的不能前来致歉。
I like listening to the radio, but I can't spend much time on it.
我喜欢听收音机，但不能花太多的时间。