2021年7月6日 托福每日一包答案
各位同学们，为了督促帮助大家持续提升英语能力，培君老师们特意给大家准备了托福每日一包。每天覆盖听说读写内容，坚持完成两周以上，就能见到自己的英语能力不断上涨哟。1.托福中级听写包答案：
According to the classic theory, this is true for the red pigment as well.
根据传统理论，这对红色也适用。
It was there in the leaf all along but it was hidden by the green chlorophyll.
它一直存在于树叶中，但是被绿色的叶绿素藏起来了。
OK, so that’s the classic explanation and it’s partially right. Why do I say partially?
好了，这是传统的解释，部分是对的。为什么我说部分？
Well, it’s probably true for pigments like yellow or orange, but it doesn’t seem to hold for the red pigment.
因为这对像黄色和橘色这样的色素可能是正确的，但是似乎不适用于红色色素。
Let’s back up a bit. Just what produces this red color in leaves? It’s a red pigment called anthocyanin.
我们往回倒一点。什么产生了树叶中的红色呢？是一种叫做花青素的红色色素。
Here is where the classic explanation doesn’t seem to apply to red.
这就是传统解释似乎不适用于红色的地方。
What’s interesting is that during the summer there was very little if any anthocyanin in the leaves,
有趣的是在夏天，树叶中几乎没有花青素，
but in the weeks before a tree is about to drop its leaves, the production of anthocyanins increases significantly.
但是一棵树开始落叶前几个周，花青素开始大量增加。
In other words, unlike those other pigments, anthocyanins are not just unmasked by the breakdown of chlorophyll in autumn;
换句话说，和其他的色素不同，花青素不是因为叶绿素在秋天分解而开始显现，
they are actually created at this time.
它们实际上是那个时候才产生的。
So that raises a question, why would a tree produce more anthocyanin just before dropping its leaves?
那么这就提出了一个问题：一棵树在落叶之前为什么要制造出更多的花青素？
Why does the tree spend so much of its resources doing this just before the leaves fall off?
为什么树要在所有的树叶掉落之前花那么多资源这么做？
On the surface, that doesn’t make sense.
从表面来看这一点都说不通。
2.阅读包答案：
还有一些商业模式为以上三种主要模式的综合体，如延迟开放模式，即这些期刊前六个月只允许付费者阅读论文，然后才免费提供给所有想阅读的人。
3.写作包答案：
中译英1：
Please find something you really love and something really important to yourself.
中译英2：
"Clear Your Plate" Campaign proposes that diners eat up their food in plates and encourages them to take leftovers home in order to avoid food wasting, so a number of restaurants in China are offering smaller dishes now. The grain wasted in China each year is close to 1/10 of the national total grain output, which has become the world's largest man-made disaster. "Clear Your Plate" Campaign reminds people that when they are wasting food without restraint, there are still many people around the world who have died of starvation. It is no longer an action of a certain organization or an individual, but one related to the human living environment, which can contribute to resolving the current shortage of resources.
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