VOA慢速英语2011.09.07
[audio]http://sound.yywz123.com/tingbbs/voa/voa20110907.mp3[/audio]Ted Swiecki is a plant scientist in California with the Phytosphere Research company and the Vacaville Tree Foundation. He says people should not water established trees at the base of the trunk. This can harm the tree.
Ted Swiecki是加州的一位植物学家，在植物圈（ Phytosphere）研究公司和Vacaville树木基金会工作。他表示，不应该在长成树木的树干根部浇水，那会对树有害。
Too much water in the soil at the base of a tree can lead to the growth of fungi. If the area is too wet, harmful organisms have a better chance to invade the tree and cause disease.
在树根部的土壤里，过多的水分会导致真菌的生长。这个区域若是太湿的话，有害生物就更有机会侵入树木并导致疾病。
Mr. Swiecki says this is true especially in Mediterranean and semi-dry climates. Many trees in these climates have adapted to having a dry area near their base during the hottest season.
Swiecki先生表示，这一观点是正确的，特别是在地中海和半干旱气候的地区。处于这类气候的很多树已经适应了在最热的季节里保持树根部位干燥。
TED SWIECKI: “Water displaces air in the soil. And roots are aerobic; they require oxygen for the soil to function properly.
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TED SWIECKI说：“水分代替了土壤中的空气。树根是需要氧气的，它们需要氧气让土壤可以正常运作.____________________________________________”
**** Hidden Message ***** This is too difficult for me. it isnot clear,and the person has a thick accent.
anyway, this block is my favorite. 听不清啊 呵呵
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