I think black cats are good luck, not bad luck.

我觉得黑猫代表好运而不是不幸。

youdao

In the end, success in this game was largely determined by luck and insight, though each team had developed a system for predicting what the black box would produce from a given input.

最后，虽然每个组都搞了一套预测黑盒结果的系统，但这场游戏中的胜利很大程度上由运气和洞察力决定。

youdao

In the Southern United States, people traditionally prepare a meal of collard greens, black-eyed peas and pork for a year of good luck.

在美国南方，人们会煮一餐由猪肉、甘蓝菜和黑豆组成的新年餐来祝家人来年好运。

youdao

The subject for the evening was "Black Cats and Four Leaf Clovers: Stories about Good and Bad Luck".

VOA: special.2009.03.27

In most Asian cultures, it is actually bad luck to wear black to a wedding because it is considered as some sort of sartorial disguise for misfortune and even even death.

FORBES: Is The Kim Kardashian And Kris Humphries Nuptials America's Version Of A Royal Wedding

Lord Black's greatest stroke of luck, however, was his purchase in 1986 of the ailing Daily Telegraph, Britain's biggest-selling quality newspaper, thanks to the help of a former editor of The Economist, Andrew Knight.

ECONOMIST: Conrad Black's story

It's impossible for the editors of Forbes.com to predict who will change the world, because major changes are Black Swans, the result of accidents and luck.

FORBES