The mission will spend the next three-and-a-half years staring at the same stars, looking for periodic dips in brightness. 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 result shows that the numerical analysis method used in our study is suitable for the periodic heat transfer process. 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。
Variations in the properties of the weld occurring at short regular intervals along the weld line due to repetitive variation in welding heat. 由于焊接热量周期变化，使得沿焊缝线每一固定的小间距焊缝的性能出现周期性变化。
Considering the effects of the outside factor and the periodic change of the predictand, the multivariate mixed threshold regression model with periodic components is developed. 摘要在综合考虑预测对象的周期变化和前期外部因子的共同作用后，给出带有周期分量的多元混合门限回归模型。
