(proverb)opposite extremes have much in common
(谚)两极亦有相逢时（相反的两极端之间有许多共同点）
take an extreme course of action; do something to an extreme degree
（让…）走极端
they took a commendable anti-ageist policy to extremes.
他们将反年龄歧视这一值得称赞的政策推向了极致。
to an extreme degree
极端，极度；非常
the reasoning was convoluted in the extreme.
这一推理让人极为费解。