科学家们要求志愿者们在四周的时间里拚命食用快餐，并降低活动量，希望他们增加体重，然后再重新回到正常的体型。
Scientists asked volunteers to gorge on fast food and be less active for four weeks, expecting them to put on weight but then return to their normal size.
第四点，身体体质下降，经常玩电脑，平时运动量基本算是没有，缺乏运动会导致我们身体体质下降，抵抗能力下降。
Decline in physical function in the body, often play computer, basic is no exercise at ordinary times, lack of games lead to decline in physical function in our body, resistance down.
文中采用示踪法研究了四氯化钛氧化反应器内径向射流混合特征，探讨了射流环开孔结构和动量比等因素对射流混合效果的影响。
The process of jet mixing in the reactor was studied with tracer technique and the effects of the opening structure on the wall of the feed ring and the momentum ratio to the jet mixing were analyzed.
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