BOB DOUGHTY: This is SCIENCE IN THE NEWS, in VOA Special English. I’m Bob Doughty.
FAITH LAPIDUS: And I’m Faith Lapidus. This week, we tell about（可连读） vitamins.
(MUSIC)
BOB DOUGHTY: Many jobs（嘴巴可张大一点，发成类似偏/啊/的音更美味） must be done with two people. One person takes the lead. The other helps. It is this cooperation（似乎miss了一个o音，我也犯了同样的错误） that brings success.
So it is with the human body. Much of（应该是v的音，不是f的音） our good health depends on the cooperation between substances. When they work together, chemical reactions take place smoothly. Body systems are kept in balance.
Some of the most important helpers in the job of good health are the substances（重音在第一音阶，由midnightblue指出的） we call vitamins.
