1.
The second periodism of the nature of elements is different from the classical periodisity of Mendeleev.
元素性质的二次周期性,有别于经典的门捷列夫周期性,它以自己特有的形式出现。
2.
The Existence Test on Regional Business Cycle and Sub- area Business Cycle of East Asia;
东亚经济周期与次区域经济周期存在性检验
3.
happening again (especially at regular intervals).
再一次发生（特指经常的周期性的）。
4.
the different need of every hierarchy also calls for periodicity;
每个层次的不同需要也具有周期性;
5.
Existence of periodic solution for a class of first-order superquadratic Hamiltonian Systems;
一类超二次Hamilton系统的周期解的存在性
6.
Subnormal Solutions of Second Order Homogeneous Linear Differential Equations with Periodic Coefficients
周期系数二阶齐次线性微分方程的次正规解
7.
Research on High-order Harmonic Generation and Its Characteristic in Modulated Fibers;
高次谐波及其在周期性波导中的特性研究
8.
The Existence Theorems of Periodic Solutions for the Second-Order Hamiltonian System under Sub-Linear Condition;
次线性条件下二阶Hamilton系统周期解的存在性
9.
First, seasonal factors, and second the end of the product life cycle.
首先是季节性因素，其次是产品生命周期结束。
10.
The Existence of Periodic and Subharmonic Solutions of Several Classes of Higher Order Difference Equations;
几类高阶差分方程周期解与次调和解的存在性
11.
The Cyclicity Reflected on M Power s Addition of Natural Numbers;
自然数数码和的m次方映射数列的周期性
12.
Periodic and Subharmonic Solutions for a Class of P-Laplacian Systems
一类P-Laplacian系统周期解及次调和解的存在性
13.
Interpolation of Cubic B-spline Closed Curve Based on Periodic Extension
基于周期性延伸的三次B样条闭曲线插值
14.
On Subnormal Solutions of n-Order Linear Periodic Differential Equations
关于n-阶线性周期微分方程的次正规解
15.
Nonexistence of Laurent Polynomial First Integrals for Periodic Systems
周期系统Laurent多项式型首次积分的不存在性
16.
Comparison of short-term clinical effect between full-mouth root planing and quadrant root planning
一次性牙周治疗和传统牙周治疗短期临床疗效比较
17.
The Almost Periodic Solution to Quadratic Differential Equation with Almost Periodic Coeffecients;
二次概周期系数微分方程的概周期解
18.
a periodical that is published every week.
一周出版一次的期刊。