时差N小时 果实成熟(上)

（单词翻译）

Usually a green, sour fruit is just a fruit that’s not ripe yet. If you left a lime on the tree longer would it eventually change color and become sweet, like an orange? Actually, limes do become much more yellow and less sour as they ripen¹. Under ripe limes are darker green and quite bitter. There are other clues to their ripeness too. Ripe limes are heavy with juice and more aromatic², with a fragrant³ “limey” smell. Most fruits we eat use similar cues to advertise ripeness.But why? Why would plants want parts of them to be eaten? Fruiting plants have evolved a partnership⁴ with certain animals in order to increase the success of their seeds. Tasty fruit pulp⁵ is the reward plants offer to animals in exchange for dispersing⁶ their seeds.

通常，一个绿色、酸味的水果还没成熟。如果你将酸橙留在树上，它最终会改变颜色，口味变甜吗？就像桔子那样吗？其实，酸橙成熟时确实变得更加黄，味道也不那么酸了。未成熟时，颜色变得深绿，味道也更苦。成熟也可其他方面看出来，成熟的酸橙果汁饱满，气味更芳香味。大部分我们吃的水果使用类似的方面来鉴定成熟度。d但是为什么？植物为什么会希望其中自身的一部分被吃掉？结果的植物进已经进化成与某些动物的关系来增加其种子的存活率。可口的水果是奖励动物们散播种子的回报。