We used to mistake that heavy objects fell faster than light ones.

我们过去错误地认为重的物体比轻的物体下落更快。

youdao

First of all, I made the mistake of logging on to iTunes when I was high and downloading every Electric Light Orchestra song ever recorded.

首先，当我正爽着下载电光乐团歌曲的时候，我错误的登陆了iTunes。

youdao

Then I try a very delicate butterfly pendant and bracelet that are so feather-light, I almost shoplift them by mistake.

于是我又试了一个精巧的蝴蝶结和手镯，这两样东西简直轻如羽毛，我几乎顺手牵羊将它们偷走。

youdao

How would you like a job where, every time you make a mistake, a big red light goes on and 18, 000 people boo?

FORBES: Magazine Article

Friends of the Earth said "a green light for shale gas would be a costly mistake for our country and countryside".

BBC: Autumn statement: A future for shale gas in Wales?

Tell them that it was a mistake for Google not to put a red light indicating that a photo or video is being taken, and that you hope there will be one in future iterations (even though evil folk may find a way to somehow disable the light).

WSJ: Google Glass: An Etiquette Guide