Even if you had never suspected that this is what was going on when leaves turn red, there are clues out there.
即使你从未怀疑过这就是树叶变红时的情况，它还是有迹可循的。
What is still not fully understood, however, is why some trees resort to producing red pigments while others don't bother, and simply reveal their orange or yellow hues.
然而，至今仍不完全清楚，为什么有些树木倾向于制造红色素，而有些树木不去刻意制造色素，但还是会呈现出橙色或黄色。
This is what the movie Red Planet begins with.
这就是电影《红色星球》的开头。
While they move along and cross over the canal, they will learn what the spirit of "Red Flag Canal" is and know how great the Chinese people are.
当他们沿着这条水渠走动并跨过它时，他们会了解到“红旗渠”精神，也会知道中国人民有多伟大。
And Uncle Matt produced from his shirt pocket a red bow and said: Father, do you have any idea what this is and where we found it?
马特叔叔从他的上衣口袋里拿出一只红色蝴蝶结，说：神甫，你知道这是什么吗？知道我们是在哪儿找到它的吗？
What appears to be a stroke of thick red paint is actually a remarkable interplay of light and cloud in the Canadian Rockies.
该图展示的是加拿大境内的落基山脉，那深深的一道红其实是光和云相互作用下的产物。
One of the classic studies in the field of psychology showed fake playing cards to users to see how they responded (a red 5 of spades, for example). Here is what the authors conclude.
在心理学领域，有一个典型的研究案例是这样的，研究者给玩牌者出示假冒的扑克牌（譬如红色的黑桃5），以观其反应。
These 12- to 15-year-olds with red stickers quickly discover what it is like to be shunned.
这些12至15岁，戴着红贴纸的孩子很快就体会到了被人回避是怎样一番滋味。
As I am retouching a portrait, the default color of 'red' is a bit of an unfortunate selection, so I changed that one to a nice green, in order to be able to see better what I am doing.
当我修整一幅肖像，默认颜色为“红色”还真是个不幸的选择，所以我改设为淡绿色，以便我能看清自己的所做所为。
In this case, what this little string says is, each point should be represented as a red o.
在这个例子中，这个小字符串的意思是，每一个点都是用一个红色的o来表示的。
Against a rising thrum from the narrow streets of the red-light district below, Mr Holbrooke asked: “What is the crisis of Pakistan?”
听着楼下昏红街区传来的人杂喧哗，霍尔布鲁克不禁问道：“巴基斯坦的危机是什么？”
Here is what it looks like, showing direction of the scrolling marquee (red arrow).
下面是其显示效果，其中显示滚动字幕的方向(红色箭头)。
What it carries out is the thought of enterprise management which is the red line of the undertaking management.
它所带来的是企业管理观念，而这是贯穿在企业管理中的一条红线。
The red line shows what share of personal income comes from wages - that is, what Americans earn from working.
红线显示工资收入占个人收入的比例——那就是，美国人通过工作获得的报酬。
What I haven't seen pointed out, however, is that Texas is not the only red state.
然而，我所看到的还没被挑明的是：德州不是唯一的红州。
You could catch a ball, hum a tune, stop at a red light - act exactly like a person but without any sense of what it is like to be alive.
你可以接住一个球，哼个小曲并可以在红灯前停下来—看起来就像所有有感觉的人一样，而事实上你的身体又没有任何感觉。
To justify taking the red pill we might ask what is the purpose of an ignorant existence?
为了给接受红色药片辩护我们也许会问无知地活着有何目的。
The red bottleneck line shows what happens when you have a resource that is at full capacity (in this example, the database) and cannot be increased in size.
红色的瓶颈线表示资源为最大容量时的情况(本例为数据库)，无法再增加大小。
If we look at what has been happening in recent years, the gauge is showing red.
当我们回顾近年来发生的事情时，这一标尺亮起了红灯。
The text of the element is what appears in the tree as the red node, as shown in Figure 2.
这个元素的文字在树中作为红色节点出现，如图2所示。
At one hilltop rise in the road, a herd of imposing white-faced, red Herefords graze under what is now a fall sun.
路上一座小山浮现，落日下一群白面红毛的赫里福德牛悠闲地吃着草。
I do not usually use red Onions, but that is what I had at the time.
我一般不用红洋葱，但是这次家里只有红洋葱。
Redshift refers to what happens when light seen coming from an object is proportionally shifted to appear more red.
红移是指当一个天体发出的光线看起来成比例地更偏向红色。
And that is what has happened to America in recent years, as its satellite industry has been entangled in Gordian knots of red tape.
而这正是最近几年美国所经历的，就像它自己卫星工业就纠结于繁文缛节的难题之中。
Though the conclusions confirm primates' avoidance of red, what drives our hesitation around the color is still unknown.
尽管结论证实了灵长类对红色有规避行为，但是驱使我们对红色作出反应内在机制仍然不明。
Part of what ails Angola is a lack of skilled civil servants, as well as too much red tape.
部分让安哥拉烦恼不已的原因是缺乏有技能的公务员以及繁琐手续。
Part of what ails Angola is a lack of skilled civil servants, as well as too much red tape.
部分让安哥拉烦恼不已的原因是缺乏有技能的公务员以及繁琐手续。
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