英语散文:Why do leaves change color in the fall? 秋天叶子为什么会变颜色?
08-26
Whydoleaveschangecolorinthefall?Whydoleaveschangecolorinthefall?asksPatriciaBrown,ofNewYorkCity.Autumn'scooldaysaretrimmedwithdeepblueskiesandgoldenlight,andbrilliantleavesofyellow,orangeandred.Leave...