BOB DOUGHTY: This is SCIENCE木听到n音? IN THE NEWS这个你发的是英式的, in VOA Special English. I’m Bob Doughty.
FAITH LAPIDUS: And I’m Faith Lapidus. This week, we tell about vitamins.
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BOB DOUGHTY: Many jobs must be done with two people. One person takes the lead. The other helps. It is this cooperation that brings success.
So it is with the human body. Much of our good health depends on the cooperation between substances. When they work together, chemical reactions take place smoothly听出是两个S连一起读,但有明显停顿. Body systems are kept in balance.
Some of the most important helpers in the job of good health are the substances we call vitamins.