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汉语拼音：zhèng bǐ

1.两个事物或一事物的两个方面，一方发生变化，其另一方随之起相应的变化，如儿童随着年龄的增长，体力也逐渐增长，就是正比。

2.一个数对另一个数的比，如9∶3。见〖反比〗。

1. 两个事物或一事物的两个方面，一方发生变化，其另一方随之起相应的变化，如儿童随着年龄的增长体力也逐渐增长，就是正比。

2. 当两个量的比是一个常数，这种关系叫做正比。

• The number of accidents is proportionate to the increased volume of traffic.

  交通事故的数字与交通量的增长成正比。

• Loss of weight is directly proportional to the rate at which the disease is progressing.

  体重的下降与病情发展的速度成正比。

• The actual stress is not proportional to the bending moment.

  实际上应力与弯矩不成正比.

• Strain is proportional to stress.

  应变量与应力成正比.

• The electric current varies directly with the voltage.

  电流与电压成正比.

• One very important feature of pseudo forces is that they are always proportional to the masses.

  赝力的一非常重要的特征是,它们永远与质量成正比.

• The amount of scattering will thus be proportional to the number of electrons.

  于是散射辅射的量将与电子数成正比.

• The information content is then proportional to the bandwidth of the imposed variation.

  此时信息容量正比于所载入的变化的带宽.

• The length of the chain molecule is proportional to the kinetic chain length.

  链分子的长度与动力学链长成正比.

• He then observed that under these same assumptions the area is proportional to the defect.

  他于是指出在同样的假设下,面积与亏值成正比.

• Therefore, the magnetomotive force in the air gap is essentially proportional to the primary ampereturns squared.

  所以, 气隙中的磁动势实际上与初级安匝数的平方成正比.

• This served to create output pulses proportional to the number of electrons emitted.

  这个装置用于产生与发射电子数成正比的脉冲输出.

• The root system of the apple tree grows in proportion to the top.

  苹果根系的生长与树冠生长成正比.

• Current is proportional to voltage with resistance being constant.

  如果电阻保持不变,则电流与电压成正比.

• Increased sICAM 1 levels reflect the clinical activation of EAN.

  EAN发病程度与sICAM-1的浓度呈正比.