Look at the color, or if you can't, taste it. ww See ~ color Wilt. ,. HP taste, over and over again --- Mordecaijun. Experience 。。。。 [logged out] Bean corns can be poisonous when eaten raw, so it is recommended not to taste them...Look at the color. If it turns black, it must be cooked...Zhao brother - - blackened on the paste [Logged out] pick out and taste, raw you can spit it out well 。。。。。。 [Logged out] I don't recommend tasting it because the vegetables will be old by the time you taste it. My experience is to look at the color, the color of the green vegetables become dark green is cooked, and then is to smell the aroma, the dish's aroma of the strongest when it is just cooked, such as stir-fried vegetables, a little over the bitter, out of the water, yellow, if the fried just right on the very crispy, and have a sweet taste, the action must be fast, hot pot of hot oil, a change of color on the pot to the cold plate, completely out of the water, especially tasty [Logged out] In fact, if you every day, you will be able to see the color of the green vegetables. If you stir-fry every day , you will soon have experience Xiao Zhi the fastest way to taste. Long time to accumulate, do it over and over again ~