Objective: To study the general regularity about physical exercise on patient's serum lipid with coronary heart disease (CHD).
目的：探讨运动锻炼对冠心病患者血脂影响的一般规律性。
Just as you would exercise care in performing simultaneous patching and other updates on a group of physical servers, you should be careful about doing the same thing in your virtual servers.
当您在一组物理服务器上同时执行补丁操作和其他更新时，您需要十分小心；同样，在虚拟服务器上执行相同的操作也要很小心。
Half of the respondents said they did little physical exercise, while many complained about working more than 10 hours a day, returning home late at night and having to work over weekends.
有一半的受访者说他们很少锻炼身体，还有很多人抱怨他们每天要工作十小时以上，晚上很晚才能回家，而且周末还得加班。
Everyone knows that exercise comes with metabolic and cardiovascular benefits, but scientists understand surprisingly little about how physical activity influences the heart itself.
大家知道运动对代谢和心血管有益，但是令人吃惊的是科学家对运动如何影响心脏知之甚少。
Xiao Li is jogging when he meets his American friend jack. They are talking about taking physical exercise. Listen to the dialogue and then read after the recording.
小李在慢跑时遇到了他的美国朋友杰克。这会儿他们正在聊体育锻炼的事儿。先听，然后跟着录音朗读。
We've known for a long time about the benefits of exercise as a way to enhance our physical condition and combat disease;
长期以来我们都知道，运动的好处就是增强体质和抵御疾病。
We've known for a long time about the benefits of exercise as a way to enhance our physical condition and combat disease;
长期以来我们都知道，运动的好处就是增强体质和抵御疾病。
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