n.扭转，曲折，弯曲
The Lot river follows a winding and tortuous course.
洛特河的河道蜿蜒曲折。
the long, tortuous process of negotiating peace
漫长而曲折的和平谈判过程
They walked through the tortuous streets of the old city.
他们步行穿过老城区中心弯弯曲曲的街道.
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