Ethylene is a plant hormone that can cause some foods to ripen too quickly .
乙烯是一种植物激素,能够导致一些食物成熟太快。
These kinds of fruit do not need any help from an apple -- they release enough ethylene to ripen themselves .
这类水果不需要苹果帮忙,它们能够释放足够多的乙烯使自身成熟。
Into the " apple town " - qingcheng county rural red , apple bending the branches heavy , bright red color make people envious , cuisheng raw sweet refreshing , with names registered " sincere " brand apples ripen .