CNN News: 樹(shù)葉為什么會(huì)變色？

Why do leaves change colors?

樹(shù)葉為什么會(huì)變色?

I want you to think about leaves on a tree as essentially mini solar panels. What they`re able to do is fascinating. They are taking the sunlight in, and through a process known as photosynthesis, they were able to transfer the sun`s energy and create a chemical known as chlorophyll.

我希望你能把樹(shù)葉想像成為一個(gè)迷你的太陽(yáng)能板。這些太陽(yáng)能板的作用就是吸引人啦。這些樹(shù)葉正在吸收太陽(yáng)能，然后經(jīng)過(guò)光合作用，樹(shù)葉能夠?qū)⑻?yáng)能轉(zhuǎn)化能葉綠素。

Now, chlorophyll is key because it gives the leaves its green colors during a long summer months. But beneath the surface, the leaves actually always have the reds, the oranges, the yellows in place. While chlorophyll is there, it`s there and it`s green. While it`s taken away in the shorter days and shorter months of autumn, now you`re releasing some of the true colors back to the surface.

現(xiàn)在，葉綠素是至關(guān)重要的，因?yàn)槿~綠素能讓樹(shù)葉在夏天保持綠色。但是，實(shí)際上，在葉子表層下有紅色、橘色、黃色。葉綠素存在的位置，葉子表面就顯綠色。雖然在秋天短短幾個(gè)月期間，葉綠素流失，葉子就恢復(fù)到了原本的顏色。

Of course, weather can play a role in this as well, especially in the vibrancy of it. When you have plenty of rainfall in the growing season or in the spring season, we`re able to get plenty of good colors in early September, October and November. If you have extreme heat, extreme drought in place, maybe a freeze, early snow storm, or the strong winds, certainly that can do damage. The leaves may not be there for you to see them in peak foliage. So hopefully, you had a chance to get out there this year and enjoy the fall colors.

當(dāng)然，天氣也非常的重要，尤其對(duì)于葉子的活力。當(dāng)在生長(zhǎng)季節(jié)或者春季的時(shí)候，降雨量較多，我們就可以在9月初、10月、11月收獲多種多樣的顏色。如果經(jīng)歷的是酷暑、干旱、或者霜凍、抑或早期的暴風(fēng)雪，葉子當(dāng)然會(huì)受到傷害，這時(shí)，你可能就不會(huì)看到大量的落葉了。所以啊，祈禱吧，今年你有機(jī)會(huì)欣賞秋天的落葉。