radish是红萝卜？

radish单指萝卜，白萝卜，红萝卜，水萝卜等。turnip指根茎类蔬菜包括萝卜。

很简单，登录米国Walmart，输入关键字，查看图片，描述，价位，另外还有一种【大根】来自日语汉字，也就是超市里最便宜的白萝卜
这时候，字典帮不了你，要借助网络

The main differences between a turnip and radishes are size, shape, color, and taste. A turnip has a round bulbous root and is usually white or yellow in color. It tastes sweet and crunchy. Radishes are round roots that grow in bunches. They’re typically red or purple in color and have a stronger flavor than a turnip.

radish水萝卜，turnip芜菁

查图解字典能确认。
radish 小红萝卜(球状)，red radish.
turnip 大水萝卜(白色)，又指芜菁

白萝卜？