convolution
noun [ C usually plural ] uk/ˌkɒn.vəˈluː.ʃən/ us/ˌkɑːn.vəˈluː.ʃən/
(TWIST)
盘绕;蜷曲
a twist
an intricate pattern of endless convolutions 无穷无尽错综复杂的图案
（故事等）曲折离奇的情节
something that makes an explanation, story, etc. complicated and difficult to understand
The movie's plot twists and convolutions demand a lot of concentration from the audience. 这部电影情节复杂，迂回曲折，观众需要全神贯注。
(IN BRAIN)
anatomy specialized脑回
one of the many folds of the surface of the brain