正文

VOA慢速英语:Study: Fitness Trackers Accurate for Heart Rate, Not Calories

2017-06-01来源:VOA

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词汇讲解：

1.examine vt.检查，调查; 考试
例句：He examined her passport and stamped it
他仔细检查了她的护照，然后在上面盖了章。

2.decision n.决定; 决议; 果断;
例句：She regretted her impetuous decision.
她后悔自己做了冲动的决定。

3.exercise n.练习; 运动，训练; 运用
例句：She exercises two or three times a week
她每周锻炼两三次。

4.instrument n.仪器; 乐器; 手段，工具;
例句：Learning a musical instrument introduces a child to an understanding of music.
学一门乐器能引导孩子了解音乐。

5.laboratory n.实验室; 实验课; 研究室
例句：This was demonstrated in a laboratory experiment with rats.
在实验室用老鼠进行的实验证明了这一点。