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strenuous

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It is best not to do strenuous exercise for a few hours and not smoke or drink alcohol for two hours.(献血后的几小时内最好不做重体力活动，两小时之内不要吸烟，不要饮酒。)
Strenuous efforts had been made to improve conditions in the jail.(为改善那家监狱里的条件已做了艰苦的努力。)
The ship went down although strenuous efforts were made to save it.(尽管人们为营救这条船做了很大的努力，它还是沉了。)
Greece, Spain and Italy all made strenuous efforts to qualify for the euro.(希腊、西班牙和意大利为加入欧元区都作出了艰苦的努力。)
Maintaining such a raveled page is strenuous.(维护这样混乱的页面十分费力。)
She made strenuous efforts to tame her anger.(她竭力压制心头怒火。)
Exercise doesn't need to be strenuous in order to be beneficial.(为了有益锻炼不需要费力。)
Pregnant women should avoid all strenuous activities, but sewing is not one of them.(怀孕的女人应该避免所有繁重的活动，但是针线活不属于这种。)
Strenuous activity level would be between 126-153 beats per minute.(较好的心率水平应该在每分钟126-153之间。)
We in China are proud of our achievements accomplished through strenuous efforts.(中国对自己通过艰苦奋斗而取得的成就感到自豪。)

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