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定性 用英文怎么说.我需要一个名词的说法,

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定性 用英文怎么说.
我需要一个名词的说法,
定性:
1.(v) establish the chemical makeup of a compound
2.(v) determine the nature of a criminal
3.characterization
定量:(n) fixed amount; ration
Relative explainations:
Examples:
1.人们的定量供应被限制为一星期一磅肉.
People were rationed to a pound of meat a week.
2.在干旱时期定量供应水
Rationing water during the drought.
3.他按定量发水给水手们.
He rationed out the water to the sailors.
4.牛肉糜压缩饼一种主要由牛肉、水果干和硬脂肪压制成的干肉饼,用作食物紧缺时的定量配给口粮
A food made chiefly from beef,dried fruit,and suet,used as emergency rations.