树叶在秋天改变颜色。
在秋天，很多叶子都从树上飘落。
叶子在秋天落下，但在春天生长。
人们相信，如果龙进入他们的房子，他们会有一年的好运气，在秋天有一个好收成。
People believed that if the dragon went into their houses, they could have good luck all year round and have a good harvest in autumn.
在秋天，树叶变了颜色，从树上掉下来。
During autumn, the leaves change color and fall down from the trees.
在秋天，伐木工人照例来砍伐一些最大的树。
In autumn the wood-cutters always came and felled some of the largest trees.
在秋天树叶落了。
18世纪，人们在秋天放飞风筝，对丰收表示感谢。
In the 1700s, kites were flown in autumn to give thanks for a good harvest.
有没有其他方法来防止这些树在秋天过度暴露在阳光下？
Do these trees have other means at their disposal to prevent overexposure to light in autumn?
如果你春天种下西瓜的种子，那你在秋天就能吃上新鲜的西瓜了。
If you plant watermelon seeds in the spring, you will be eating fresh watermelon in the fall.
枫叶在秋天变成了鲜红的颜色，为丰收的季节增添了另一抹色彩。
The maple trees turn brilliant red in autumn, adding another dimension to the colors in the harvest season.
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。
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.
在秋天，很多树叶变黄并从树上落下。
In autumn, quite a few leaves turn yellow and fall off the trees.
有一半水果作物在秋天突如其来的严寒中冻死了。
在秋天，青蛙取笑松鼠的勤劳。
在秋天花草都枯萎了。
树叶在秋天变黄。
那个小男孩问他的父母为什么树在秋天掉叶子。
That little boy asked his parents why the leaves fall from the trees in autumn.
农民在秋天或春天犁田。
树叶在秋天枯萎。
我喜欢在秋天的山野游玩，因为那里的树叶会变成鲜艳的颜色。
In fall, I like to visit the mountains because the foliage there changes into such vivid colors.
“整个理论大厦崩溃了”，这位前任联邦出席在秋天如是告诉国会。
“The whole intellectual edifice has collapsed,” the former Fed chairman told Congress that fall.
几年前，我买了这些金色的枝条，它们一直是我很喜欢的东西，尤其是在秋天。
A few years ago I bought those golden branches and I love them all year but especially in the fall.
史密斯说，一些物种，例如最有名的枫树，在秋天会产生的一种抗氧化剂的花青素。
Smith says that some species, most famously maples, produce anthocyanin during autumn as a kind of antioxidant for trees.
在秋天，男性地图阅读能力的得分更高，因为在这个季节，睾酮的水平最高。
Men score higher in map-reading ability in the autumn when thei r testosterone is at its highest levels.
那些在秋天我们能嗅到落叶香味，看着它们逐渐覆盖大地的时光，这一切显得都那么可数。
The finite number of times we can smell that beautiful smell in the air as the leaves begin to fall and quietly blanket the ground in autumn.
一些银行企图在秋天试探性地取消一部分公司贷款协约，因为这些公司的财政花费已经很高了。
Some banks made tentative attempts in the autumn to pull out of loan agreements because their cost of financing had spiked so high.
瑞典秋季，醉醺醺的麋鹿很常见。因为在秋天，瑞典的花园里会有大量的苹果掉在地上或者挂着枝头。
Drunken elk are common in Sweden during the autumn season when there are plenty of apples lying around on the ground and hanging from branches in Swedish gardens.
不过在秋天的时候，那些要求自信以及同事间信任的商业活动将帮助他们摆脱最无聊和最无意义的项目。
In autumn however, business activity, acquired self-confidence and trust in colleagues will help them get rid of the most boring and insignificant projects.
不过在秋天的时候，那些要求自信以及同事间信任的商业活动将帮助他们摆脱最无聊和最无意义的项目。
In autumn however, business activity, acquired self-confidence and trust in colleagues will help them get rid of the most boring and insignificant projects.
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