枫叶?

笨妈笨爸

资深人士
VIP
注册
2012-08-11
消息
7,346
荣誉分数
1,190
声望点数
273
看枫叶一般是什么时候?
问得早了点,但是想提前计划一下。谢谢。
 
去年因为干旱,所以红叶颜色特别好。今年雨水贼多。。。
 
cfc一~爹!
 

我找到不同的说法了。听谁的?



oak_leaf2.gif
Why do some years have autumns more colorful than others?
The intensity of autumn leaf coloration each year is different. This is because the amount and exposure of colored chemicals in leaves depend on the weather. Green chlorophyll disappears fastest during an autumn with bright sunlight and cold days. This disappearance quickly exposes the leaves' orange and yellow pigments to view. Dry weather concentrates sugar in the cell sap, which speeds up manufacture of red compounds. So the most colorful autumns depend on the weather. Dry, sunny days of an Indian summer that are followed by cool, dry nights will create the best season for the fall leaf show. You can predict good viewing if you analyze the weather conditions.
 
我找到不同的说法了。听谁的?



oak_leaf2.gif
Why do some years have autumns more colorful than others?
The intensity of autumn leaf coloration each year is different. This is because the amount and exposure of colored chemicals in leaves depend on the weather. Green chlorophyll disappears fastest during an autumn with bright sunlight and cold days. This disappearance quickly exposes the leaves' orange and yellow pigments to view. Dry weather concentrates sugar in the cell sap, which speeds up manufacture of red compounds. So the most colorful autumns depend on the weather. Dry, sunny days of an Indian summer that are followed by cool, dry nights will create the best season for the fall leaf show. You can predict good viewing if you analyze the weather conditions.

这两个说法不矛盾。
Indian summer =/= summer
 
这两个说法不矛盾。
Indian summer =/= summer

什么是Indian summer呀?我正想问呢。
 
in·di·an sum·mer
Noun
  1. A period of unusually dry, warm weather occurring in late autumn.
  2. A period of happiness or success occurring late in life.
http://en.wikipedia.org/wiki/Indian_summer
An Indian summer is a heat wave that occurs in the autumn. It refers to a period of considerably above-normal temperatures, accompanied by dry and hazy conditions, usually after there has been a killing frost. Depending on latitude and elevation, it can occur in the Northern Hemisphere between late September and mid November.
 
in·di·an sum·mer
Noun
  1. A period of unusually dry, warm weather occurring in late autumn.
  2. A period of happiness or success occurring late in life.
http://en.wikipedia.org/wiki/Indian_summer
An Indian summer is a heat wave that occurs in the autumn.

哈哈哈〜〜没想到还有第二个意思。
 
后退
顶部