zero n. (pl. zeros, zeroes) 1.【数学】零;零号。 2.零位;零点,起点;(温度表的)零度,冰点;座标原点;无。 3.最低点;【天文学】天底;【航空】零高度。 4.没价值的人[物]。 5.【军事】= zero hour. the absolute zero 【物理学】绝对零度〔-273.16℃〕。 the air zero 原子弹空中爆炸中心。 fly at zero 超低空(1000英尺高度以下的)飞行。 vt. 1.把(调节器等)调整到零位。 2.把…减少到零位。 zero in 1. 调整(枪炮的)射距,把(枪炮等的标尺)调整到标准无风部位瞄准。 2. 把(火力)对准目标 (on)。 zero out 给…以免税待遇(to zero out funding for public broadcasting 对用于公共广播的经费实行免税)。 adj. 1.零(度)的。 2.【气象学】云幕低于50英尺,能见度小于165英尺的。
Given the rotational speed of the driving wheel, the temperature in the contact zero rises evidently as the load is increased . given the load, however, this temperature rises faintly as the rotational speed of the driving wheel increases . when the modulus is small and rational rate is high, the change of the rational speed and load have the apparent influence on the temperature distribution, but when the modulus is larger and rational rate no larger than 1.0, the above changes have negligible influence on the temperature distributions 当主动轮转速一定时,随着载荷的增加,接触区的温升明显增加;当载荷一定时,随着主动轮转速的增加,接触区的温升却无明显变化;当模数较小、传动比较大时,转速和载荷的变化对接触区温度分布的影响比较明显;但当模数较大而传动比i‘1时,转速和载荷的变化对温度分布影响较小。