Why does chlorophyll need protection when it is the natural world's supreme light absorber?
为什么叶绿素是自然界最高等的光吸收体，却需要保护？
It's colder there, they're more stressed, their chlorophyll is more sensitive and it needs more sunblock.
那里更冷，它们受到更大压力，它们的叶绿素更敏感，并且需要更多的避光措施。
Why protect chlorophyll at a time when the tree is breaking it down to salvage as much of it as possible?
在树木将叶绿素分解，以尽可能多地将其回收的时候，为什么我们还要保护叶绿素呢？
As chlorophyll is depleted, other colours that have been dominated by it throughout the summer begin to be revealed.
当叶绿素耗尽时，在整个夏季被它主导的其他颜色开始显现。
Scientists use these changes in ocean color to estimate chlorophyll concentration and the biomass of phytoplankton in the ocean.
科学家利用海洋颜色的变化来估计叶绿素含量以及海洋浮游植物的生物量。
Before letting its leaves go, the tree dismantles their chlorophyll molecules and ships their valuable nitrogen back into the twigs.
在树叶凋落之前，树会分解叶绿素分子，把有用的氮运回树枝中。
The weakened fall leaf then becomes vulnerable to the highly destructive effects of the oxygen created by the excited chlorophyll molecules.
活跃的叶绿素分子产生的氧气破坏性强，秋天衰弱的树叶随后变得更容易受到影响。
The energy absorbed by the chlorophyll molecules of the unstable autumn leaf is not immediately channelled into useful products and processes, as it would be in an intact summer leaf.
不稳定的秋叶叶绿素分子吸收的能量，不会像在完好的夏叶中吸收的能量那样立即传输到有用的产品和工艺流程中去。
It sounds paradoxical, because the idea behind this hypothesis is that the red pigment is made in autumn leaves to protect chlorophyll, the light-absorbing chemical, from too much light.
这听起来很矛盾，因为这一假设背后的理念是，树叶在秋天产生的红色素是用于保护叶绿素这种吸收光的化学物质，以免它吸收过多的光。
Plants today are green because they use green chlorophyll to produce energy.
现在的植物是绿色的，因为它们利用绿色的叶绿素产生能量。
This map shows the average chlorophyll concentration in the global oceans from July 2002-may 2010.
这张地图显示了从2002年7月至2010年5月间全球海洋的平均叶绿素浓度。
But Lake Superior's chlorophyll levels - a measure of the presence of phytoplankton -have been falling.
但是苏必利尔湖中，用来衡量存在的浮游植物的叶绿素水平一直在下降。
Researchers discover evidence for a new type of chlorophyll in cyanobacteria that can absorb near-infrared light
研究人员在蓝细菌中发现了一种新叶绿素分子的证据，这种叶绿素分子能够吸收利用近红外光。
These amazing health benefits of chlorophyll are the main reason why leafy greens are so good for our health.
叶绿素的这些惊人的健康益处是绿叶蔬菜对我们的健康有那么多好处的主要原因。
When exposed to light with a wavelengths of about 400 nanometers the normally green colored chlorophyll glows red.
当暴露于波长约400纳米的光中，普通绿色叶绿素将发出红光。
Also like terrestrial plants, phytoplankton contain the pigment chlorophyll, which gives them their greenish color.
浮游植物也和陆生植物一样含有叶绿素，这样看起来就略显绿色。
That violet light strikes the nearby chlorophyll molecules, excites them, and the chlorophyll then produces the red light.
这种紫光冲击并激发邻近的叶绿素分子，使它们发出红光。
That means that organisms that have this chlorophyll inside can extend their photosynthetic range for maximum use of solar energy.
这意味着含有这种叶绿素的生物可以拓宽他们的光合范围，最大限度地利用太阳能。
In a slick of molten gold, dawn breaks and the trees awaken. In every leaf, chlorophyll molecules are seizing the day for photosynthesis.
天边有了一道金色的阳光，破晓了，于是树都苏醒了，于是每一片叶子，每一个叶绿素都忙活起来，把握时光进行光合作用。
Phytoplankton are most abundant (yellow, high chlorophyll) in high latitudes and in upwelling zones along the equator and near coastlines.
位于高纬度以及赤道和靠近海岸线的上升流区的浮游植物最为丰富(黄色代表高叶绿素)。
I think what they found here is a new modification of chlorophyll that shows the flexibility of photosynthetic organisms to use whatever light is available.
我认为他们发现的新叶绿素分子是叶绿素分子的一个新的修饰，它展示了不同光条件下光合生物的灵活性。
Researchers may have found a new form of chlorophyll, the pigment that plants, algae and cyanobacteria use to obtain energy from light through photosynthesis.
叶绿素作为一种色素，植物，藻类和蓝细菌都利用此色素通过光合作用从太阳光中获取能量。 现在研究人员可能已经发现了一种新的叶绿素分子。
They examined a half-million data points collected using a tool called a Secchi disk, as well as measurements of chlorophyll-a pigment produced by the plankton.
他们检查了50万个由一种被称为塞齐盘的工具所采集的数据点，并且测量了由浮游植物所产生的色素——叶绿素。
"I think this is a very important new development and is the first new type of chlorophyll discovered in an oxygenic organism in sixty years," he wrote via E-mail.
“我认为这是一个非常重要的新进展，而且也是60年里在产氧生物中发现的第一个新叶绿素分子”他在Email里写道。
The researchers used a radioactive tracer to be sure that the slugs are actually producing the chlorophyll themselves, as opposed to just stealing the ready-made pigment from algae.
研究人员利用放射性示踪法确定，这种海蛞蝓确实能自己产生叶绿素，而不仅仅是从海藻那里偷取现成的色素。
Individual phytoplankton are tiny, but when they bloom by the billions, the high concentrations of chlorophyll and other light-catching pigments change the way the surface reflects light.
单个的浮游植物是渺小的，但是当它们爆发成数十亿规模的水华后，高浓度的叶绿素以及其他采光颜料改变了表面反射光线的方式。
A view of autumn treetops, with various types of trees each changing their own unique shade of fall thanks to the breakdown of chlorophyll, the pigment that lends leaves their original green color.
一个秋天的景观，由于叶绿素破裂(叶绿素是赋给树木和树叶原来绿色的色素)，各类树木改变成了自己所独具的秋天色调。
A view of autumn treetops, with various types of trees each changing their own unique shade of fall thanks to the breakdown of chlorophyll, the pigment that lends leaves their original green color.
一个秋天的景观，由于叶绿素破裂(叶绿素是赋给树木和树叶原来绿色的色素)，各类树木改变成了自己所独具的秋天色调。
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