上学期留学生的考试成绩一直无规律地波动，在教学改革后成绩有明显上升。

Last semester the scores of the foreign students fluctuated irregularly, but showed an obvious increase after the reform in teaching.

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“看过了什么？”他顺着她手指的方向，看到了屏幕上的一串串波形，上下波动，毫无规律。

"Have a look at what?" he looked at where her finger traced a series of lines on the screen, all drifting up and down chaotically.

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越来越多的研究者发现，金融市场价格看似无规律的波动背后，似乎有一些潜在的信息或规律。

Researchers in an increasing number find that certain potential information or pattern exist behind the plausibly ruleless price fluctuation in the financial markets.

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