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草場(chǎng)“輪休”Hints: 無(wú)Grasslands need time to rest when cattle and other animals feed on them. Moving animals from one area of pasture to another can provide the time needed for new growth. This i...

降溫也要給樹木保暖Hints:University of Arizona Extension University of California FloridaJim BottcherUniversity of Florida Extension Cold weather is most likely to damage or kill plants that do no...

氣溫下降時(shí)作物和樹木的保暖Hints:Floridathe Sunshine StateBrazilArctic Air Florida, in the southeastern United States, is called the Sunshine State. It grows more oranges than anyplace except Bra...

今晚，當(dāng)你在倒數(shù)計(jì)時(shí)、慶祝新年時(shí)別忘了抬頭看看天空上那一輪滿月——這是本月的第二輪滿月，也就是英語(yǔ)俗語(yǔ)中的“藍(lán)月”。上一次“藍(lán)月”出現(xiàn)在新年夜還是在20年前的1990年，而它下一次在新年夜出現(xiàn)將要等到2028年。

氣候變化的妥協(xié)（2） Hints: Copenhagen India's environment minister praised the united position taken by India, China, Brazil and South Africa. He said it permitted them to avoid the legally bindi...

氣候變化的妥協(xié) Hints: Copenhagen Denmark the United States China India Brazil South Africa Obama carbon dioxide degrees Celsius Almost 200 countries met for two weeks at a United Nations confere...

亞非非法捕殺犀牛行為增加。 Hints: South Africa rhino Asia India Nepal CITES Wild Fauna and Flora Doha Qatar The report says poaching and illegal horn trade has increased in South Africa even wit...

亞非地區(qū)非法偷獵犀牛活動(dòng)日益猖獗。 Hints: Vietnam the International Union for the Conservation of Nature Traffic ZimbabweA new report says the illegal killing of rhinos for their horns is incre...

鯉魚過(guò)多成問(wèn)題，美國(guó)官員找對(duì)策。 Hints: the Great Lakes Michigan Mississippi Midwest Utah Provo June sucker The barrier, however, may not be enough to protect the Great Lakes. There are calls in...

美國(guó)官方尋找鯉魚問(wèn)題的解決辦法。 Hints: Mississippi Great Lakes Michigan Army Corps of Engineers Chicago Sanitary Ship Canal Last week our subject was illegal fishing. Now we report on 2 case...