"an old wives' tale" in Chinese (Simplified)
Definition
一种传统信仰或故事，通常与健康或自然有关，没有科学依据，通常是不真实的。
Usage Notes (Chinese (Simplified))
通常为非正式表达，有时带有幽默，用于否定没有科学依据的说法。常用于健康、怀孕或民间治疗等话题。并非真的指“老妇人”，而是泛指迷信传说。
Examples
My grandmother says eating carrots will help you see in the dark, but that's just an old wives' tale.
我奶奶说吃胡萝卜能帮助夜视，但那只是**一个民间传说**。
It's an old wives' tale that going outside with wet hair will make you sick.
外出时头发湿会生病只是**一个民间传说**。
Many people believe that cracking your knuckles causes arthritis, but it's an old wives' tale.
许多人相信掰指关节会得关节炎，但这只是**一个老人的谣言**。
I used to think you could catch a cold from cold weather, but apparently that's just an old wives' tale.
我过去以为受凉会感冒，但原来这只是**一个民间传说**。
Don’t believe everything you hear—sometimes it’s just an old wives' tale.
不要全信你听到的，有时那只是**一个民间传说**。
My mom says eating before swimming is dangerous, but I think that's just an old wives' tale.
我妈说游泳前吃东西很危险，但我觉得那只是**一个民间传说**。