arduous and tortuous;full of difficulties and reverses ;

I should want to see the pageant of man's progress, the kaleidoscope of the ages.
我想看看人类进步所走过的艰难曲折的道路, 看看历代的兴衰和沧桑变革.
来源:期刊摘选He struck off from the rude paths he had been following into the trackless wilderness.
他便离开了那条他一路行走的艰难曲折的小路,进入了茫茫无际的荒野之中.
来源:词典精选例句
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