Brue beans, yes also known as string beans, but not lentils.

The lentil is not only wide and short, it has a kind of eating face, but inside the bean is not very full, mainly to eat the skin, there is a kind of inside the bean bean but full, fried to eat special flavor, mainly to eat beans.

And kidney beans, but also a lot of varieties, there is that kind of skin looks white, that is called the old to less, the older the more delicious and more fragrant. There is also a kind of shape with the old less similar, but green, I do not know what to call. There is also a kind of surface is also green, but like lentils, broad, longer than lentils, easier to cut into juliennes fried.

Overall, lentils from the appearance of a bean very clear outline, kidney beans do not.