冬天一到，白菜闪亮登场，成了餐桌上的“人气王”！可大家有没有发现，菜叶上好像会偶尔冒出一些小黑点，这时你是不是心里开始直打鼓：这黑点到底是啥？这白菜还能吃吗？ The tiny black spots are mainly found on the outer layer of the Chinese cabbage stems, creating a mottled appearance tha ...