History follows a tortuous course.
历史的进程是曲折的。
The cuboidal cells often extend valve-like cytoplasmic processes which give the channels a tortuous course.
立方形间皮细胞常伸出瓣膜状胞质突起，使腹膜下小管呈蜿蜒曲折状。
A review of these 3 years shows that we have traversed a tortuous course and that our achievements are hard won.
回首这三年，我们走过的道路很不平坦，成绩来之不易。 收藏。
Sometimes it comes up against a narrow section flanked by high mountains and steep cliffs, winding through a course with many a perilous twist and turn-following a dangerous tortuous course.
有时流到很逼狭的境界，两岸丛山迭岭，绝壁断崖，江河流于其间，回环曲折，极其险峻。
Sometimes it comes up against a narrow section flanked by high mountains and steep cliffs, winding through a course with many a perilous twist and turn-following a dangerous tortuous course.
有时流到很逼狭的境界，两岸丛山迭岭，绝壁断崖，江河流于其间，回环曲折，极其险峻。
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