If you describe a sentence, idea, or system as convoluted, you mean that it is complicated and difficult to understand.
例句
Despite its length and convoluted plot, 'Asta's Book' is a rich and rewarding read...雖然篇幅很長，而且情節復雜，但是《阿斯塔的書》仍不失為一部內容豐富、值得一讀的作品。The policy is so convoluted even college presidents are confused.這項政策太令人費解，甚至連大學校長們也是一頭霧水。
"the Byzantine tax structure""convoluted legal language""convoluted reasoning""intricate needlework""an intricate labyrinth of refined phraseology""the plot was too involved""a knotty problem""got his way by labyrinthine maneuvering""Oh, what a tangled web we weave"- Sir Walter Scott"tortuous legal procedures""tortuous negotiations lasting for months"