家庭主妇们经常抱怨:好端端的土豆,一削皮就露出里边褐黑色的一块块坏斑,待到把这些坏区全削去,一颗土豆便所剩甚小.唉!真可惜.奇怪的是,买土豆时任你怎么挑选,也总是避免不了有坏斑.这种倒霉的“内伤”在苹果、梨等水果中也时有遇到.心细的学过力学的人,不难回答这个问题.原来毛病出在包装运输中.在装车运输土豆时人们总想装 Housewives often complain that the good-end potatoes peel off a piece of blackish brown speckles inside, and when they cut them all, a potato leaves little left. Yes, when you buy potatoes, how you choose, but also always can not avoid a bad spot.This unlucky “internal injuries” in the apple, pear and other fruits have also encountered.Silily learned mechanics, is not difficult to answer The problem is that the original problems in the packaging and transportation in the transport of potatoes when people always want to install