Some are merely random fluctuations.

有一些只不过是随机波动。

youdao

Much of the initial haul turns out to be random fluctuations or experimental glitches.

许多最初获得的数量证明是随机波动或实验故障。

youdao

Bias may arise because large random fluctuations of the estimated treatment effect can occur, particularly early in the progress of a trial.

治疗效应可能会出现较大的随机波动从而导致偏倚的产生，特别是在试验的早期。

youdao

At the risk of oversimplifying, this is the lack of noticeably non-random fluctuations in the cosmic microwave background spectrum measured by Planck.

FORBES: Cosmic Inflation Model Gets A Boost From Planck Data

But at the moment, the apparent increase could be attributed to any number of factors, such as better diagnosis, or random fluctuations in the incidence of the disease, rather than the start of an epidemic.

ECONOMIST: Mad-cow disease

Both ATLAS and CMS have seen a number of these predicted patterns often enough to pique interest, but not (yet) often enough to constitute proof that they came from Higgses, rather than being random fluctuations in the background of non-Higgs decays.

ECONOMIST: The Higgs boson