1. He ate a small quantity of rice.
   他吃了少量的米饭。
2. Our new director is still an unknown quantity.
   我们对新来的主管知之甚少。
3. In algebra, the sign X usually denotes an unknown quantity.
   在代数里, 符号X常用来表示未知数。
4. Forensic examination revealed a large quantity of poison in the dead man’s stomach.
   法医检验发现死者的胃里有大量的毒药。
5. You must eliminate an unknown quantity.
   你必须消去一个未知数。
6. Mathematics is the science of pure quantity.
   数学是纯粹研究数量的科学。
7. Quantities of food were on the table.
   桌上摆了大量食物。
8. A large quantity of beer was sold.
   售出了大量的啤酒。
9. It's wrong to sacrifice quality to quantity.
   牺牲质量去追求数量是错误的。
10. She was burdened with a large quantity of parcels.
    她吃力地捧着一大堆包裹。
11. Large quantities of water are needed for cooling purpose.
    冷却要用大量的水。
12. This medicine is poisonous if taken in large quantities.
    这种药若服用过量是有害的。
13. Quantities of food were spread out on the table.
    许多食品被摊放在桌子上。
14. How can such a large quantity of know-ledge be acquired?
    这么大量的知识怎样才能学到呢?
15. Three is a plus quantity.
    三是一个正数。
16. Dimethoxymethane possesses higher quantity of oxygen, higher ratio of hydrogen to carbon and lower flash point.
    甲缩醛含氧量大、氢碳比高、闪点低，加入柴油中能够提高其十六烷值。
17. In an addition operation,a number or quantity added to the augend.
    在加法运算中,加到被加数上的数或量。
18. Quantity of water solubilization by rust inhibitors was calculated based on the phase digram.
    在相图测定的基础上,计算出防锈剂对水的增溶度。
19. His work is good in respects of quality but bad in respect of quantity.
    他的工作质量很好, 但数量很少。
20. What i the actual quantity tated?
    实际的数量说明什么？

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