Children expend a lot of energy and may need more high-energy food than adults.孩子们消耗很多能量，可能比成年人需要更多高能量的食物。If you give up exercise, your muscles shrink and fat increases. By the same token, if you expend more energy you w...
I think it is safe to say that very few students expend the effort to do quality work in school.我认为可以肯定地说学校里很少有学生肯为学好功课下功夫。I think it is safe to say that very few students expend the effort to do quality work in school.....
More than 7 million shares changed hands, treble the normal daily average.有700多万股换手，是通常日平均成交量的3倍。They will have to pay much more when rents treble in January.一月份房租增加两倍时，他们将被迫多付不少钱。to turn up the treble on the stereo把立体声唱...
The polynucleotide chain is helical.多核苷酸键是螺旋形的.In a globular protein, certain portions of the chain are coiled into helical segments.在球状蛋白中, 链的某些部分被盘成螺旋状.Two types of viral symmetry have been recognized, the cubical symm...