checkered

复杂的过去

refers to an individual's background, often implying it contains questionable or controversial events.

指个人的背景，通常暗示其包含可疑或有争议的事件。

曲折的历史

refers to the past of a person, place, or thing that is varied and contains both good and bad periods.

指包含成功和不成功时期在内的许多不同阶段的过去。

波折的职业生涯

describes a professional life with many changes, and a mix of successes and failures.

描述一个充满变化、成败交织的职业生涯。

方格旗

a flag with a pattern of black and white squares, waved to signal the winner or the end of a race.

黑白方格图案的旗帜，挥动以示比赛结束。

格子衬衫

a shirt with a pattern of squares in two or more different colors.

带有方格图案的衬衫，通常颜色交替。