留美老师带你每日说英文 第430期:叶绿素的分解(在线收听

   台湾籍旅美老师今天交给我们的句子是:

  Chlorophyll breaks down and is replenished all summer long. As daylight hours shorten, however, veins that bring water and nutrients to the leaf gradually close off.
  整个夏天,叶绿素不断分解,然后又被补足。但是当日照时数缩短的时候,为叶子带来水分跟营养的叶脉会逐渐关闭。
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