地球轨道的周期性变化会影响地球的气候。
Periodic changes in Earth's orbit could affect Earth's climate.
他经历了周期性的变化。
气候变化及周期性的厄尔尼诺现象引起的海水变暖，已经造成了大面积的珊瑚礁在所谓的“漂白”事件中消失殆尽。
Warmer sea temperatures caused by climate change and periodic El Nio events have caused large areas of coral to be wiped out in so-called "bleaching" events.
鼻翼两边的阻力呈现一种有规律的周期性变化。
There is a regular cycle of change in resistance between the two sides of the nose.
收入的改变，工作的改变和家庭费用的改变反映了这种周期性变化，而其它指标，如作为可支配收入部分的个人存款，数十年来已经逐渐减少了。
Changes in incomes, jobs and home prices reflect this cyclical behavior, while other indicators, like personal savings as a percentage of disposable income, have shown a gradual decline over decades.
不过，也有人说，这只不过是一次周期性变化。
But there are those who say that this is just another cycle.
通过控制器控制某一变量或函数进行周期性变化。
Periodic change imposed on a controlled variable or a function by a controller.
在某些细胞系中，细胞表面抗原性或对表胚凝集素的反应方面有相近似的周期性变化。
In some cell lines there is a similar periodicity in changes of cell surface antigenicity or response to wheat germ agglutinin.
生猪产业的一个主要特征是产量和价格的周期性变化。
Cyclical fluctuation of production and price is the main characteristic of pig industry.
没有能流通过节点（或腹点），但在其他各点，能流密度随时间作周期性变化。
There is no current flowing through any node(or antinode. ), but the current density changes periodically with time at other places.
对于地球这样一个有大气层的行星而言，这种能量的周期性变化会对大气气温产生显著的影响。
For a planet with an atmospheric layer like earth, the periodic inherent energy change can produce a remarkable effect on its atmospheric temperature.
张力腿平台的垂荡引起张力周期性变化，对张力腿的涡激横向振动起参数激励的作用，使其动力响应更为复杂。
Periodical variations of tether's tension caused by heaving oscillation of TLP play the role of a parametric exciter to vortex-induced vibration, and make it more complicated.
气候降水是该区水资源的主要来源之一，也是影响该区水资源周期性变化的主要因素之一。
Climate rainfall is not only one of main sources of water resources, but also one of major factors affecting periodic change of water resources over this region.
在北极点与大约55度N纬圈之间气压分布的周期性变化。
A periodic change in the distribution of pressure between the North Pole and a circle at about 55degree.
此外，统计还显示出许多耀斑爆发前谱斑亮度可能有着1—2天的周期性变化。
Besides these, the statistics tells us that flocculi brightness may have 1-2~d periodic changes before the outbursts of flares.
证明了在一定条件下，热源供热量周期性变化引起的室内温度的波动幅度有限，不影响供热质量。
It is proved that under certain conditions, the periodic change of heat supply from heat source has caused little fluctuation in room temperature, and will not influence heat-supply quality.
研究结果还表明：海风和陆风垂直方向呈非对称分布及热力环流具有明显的周期性变化。
Studies suggest that the vertical distribution of the breezes is asymmetric and the thermal circulation exhibits marked periodic variations.
任务将花费三年半时间盯住类似目标，搜索亮度周期性变化的恒星。
The mission will spend the next three-and-a-half years staring at the same stars, looking for periodic dips in brightness.
高双折射光纤的一个重要参数是拍长，由于拍长很短和周期性变化，如何实现准确测量是十分困难的。
One of the most important parameters about high birefringence fibers is the beat length. Because of its shortness and periodicity, measuring beat length is a critical one.
本文分析了闽东南沿海城市的热岛强度的平面分布和周期性变化。
This paper analyses the area distribution and periodic variation of intensity of the urban heat island in southeastern coastal cities of Fujian Province.
稚贝足丝的分泌，具有明显的日周期性变化，昼夜差异极显著。
The secrete of young shellfish foot-thread has the obvious sun periodicity change, the difference of its day and night is marked.
计算结果表明，对周期性变化的传热过程，采用这种数值分析方法是适宜的。
The result shows that the numerical analysis method used in our study is suitable for the periodic heat transfer process.
同时，为了进一步了解黑洞的物理过程，通过研究黑洞态以及其光变曲线的周期性变化一直以来是一种十分重要的方法。
Moreover, it is a very important method with study black hole states and the periodicity of the light curve to study their physical process.
在不考虑其它因素影响的条件下，细纱断头率在一昼夜内存在着周期性变化的现象。
Neglecting the influence of other interfering factors. it is found that the end breakage rate varies periodically round the clock.
地幔圈形状周期性变化使地壳产生势能（位能）力导致地壳运动。
That the cyclical change of the shape of the mantle produces potential energy force in earth's crust results in crustal movement.
而在不同纵向位置，这些同心环的强度分布是不同的，且是周期性变化的。
However in different longitudinal position, the intensity distribution of these rings is different and varies periodically.
研究在辐射和对流同时作用下肋根温度作周期性变化时矩形肋片的传热特性。
The heat transfer performance of a rectangular fin during periodic fin base temperature change is studied under simultaneous action of radiation and convection.
研究在辐射和对流同时作用下肋根温度作周期性变化时矩形肋片的传热特性。
The heat transfer performance of a rectangular fin during periodic fin base temperature change is studied under simultaneous action of radiation and convection.
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