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减少分数
1、gallon fraction───加仑分数
2、a fraction of───一小部分；一部分；零点几
3、complex fraction───n.繁分数；n.[数]繁分数
4、reduce down───减少
5、fraction───n.分数；部分；小部分；稍微
6、reduce to───迫使；使处于；使变弱为；归纳为；使降低到; 遭受; 归纳; 折合
7、lessen reduce───减少
8、reduce───vi.减少；缩小；归纳为；vt.减少；降低；使处于；把…分解
9、partial fraction───部分分数，部分分式；[数]部分分式；[数]部分分数
1、Catastrophes such as fire, flood, drought or epidemic may reduce population sizes to a small fraction of their average level.───火灾，洪水，干旱或流行病可能减少种群数量到他们平均水平的一小部分。
2、In this exercise you have to convert a given number into a fraction by entering a numerator and denominator. Do not forget to reduce the result.───在此练习中您要将一个给定的数字转换成一个分数，输入转化结果的分子和分母。不要忘了将结果约分至最简分数。
3、anyway, employee pay is only a small fraction of federal expenses; even cutting the payroll in half would reduce total spending less than 3 percent.───不管怎么说，雇员工资只占联邦开支很小一部分；即便将工资削减一半，整个开支只减少不到3%。