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A class of bilevel multi-objective programming was converted into the problem of equivalent single-level multi-objective programming. Then a new chaos genetic optimization algorithm was presented by using the inversion property of genetic algorithm and the ergodic property of chaos optimization method and combining with the exact l_1 penalty function.

针对求解一类二层多目标规划问题，首先将其转化为等价的单目标规划问题，然后利用遗传算法优化的反演性和混沌优化方法的遍历性，并结合精确罚函数求解非线性约束优化问题，提出了求解此类问题的混沌遗传算法。

"To meet these challenges we are constantly looking for world-class electricity distribution technologies," says Ergon Energy.

Ergon Energy电厂表示："应付这些挑战，我们一直寻找世界级电力配送技术。"

Chinese fried malt, pepper, Glauber's salt, etc., Western medicine L-Dopa, ergonovine, estrogen, vitamin B6, atropine class and diuretic drugs, these drugs can milk the mother returned.

中药炒麦芽、花椒、芒硝等，西药左旋多巴、麦角新碱、雌激素、维生素B6、阿托品类和利尿药物，这些药能使母亲退乳。

Based on the simplification of differential equation of driving function and the amendment of control law with error integral, the problems of controller design for a class of position serve system are discussed from the angle of practical use in engineering.

基于对驱动函数微分方程的简化和对控制律的误差积分修正，从工程实用角度讨论一类位置伺服系统控制器的设计问题。

Ecause the method can track satisfactorily all types of state of a class of uncertain variable structure systems, it can extend the nonlinear state error feedback control law and auto disturbance rejection controller application field.

该方法能有效跟踪变结构非线性系统的各阶状态变量，拓宽了非线性状态误差反馈控制器和自抗扰控制器的应用范围，同时给予了稳定性证明。

The only way to share mutable state is via the Unsafe class which exists only as an escape hatch.

要共享可变状态只能通过Unsafe class，这个类只是一个安全舱口。

Escape."It's time for class, and I can't be late again."

"上课的时间到了，我不能再迟到了。"

This is a great game to use in an ESL class.

这是一个极好的可以用于英语教学的游戏。

According to your English level, you shouldn't in the ESL class any more.

根据你的英语水平，你不应该再在语言班里了。

That's why the first ESL class began.

他说"这就是为什么第一个ESL的概念诞生！"

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。