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By applying a fixed pointed theorem for condesing maps, the sufficient conditions of controllability are given. This method is based on integral expression of solutions, the problem can be converted info fixed point problem of single-valued integral operators.

利用凝聚映射的不动点定理给出了一类发展包含的可控性的充分条件，处理问题的方法是基于解的积分表示，将所讨论的问题转化为集值积分算子的不动点问题。

This paper discusses the influence of the θ-pairs associted to a famity of special maximal subgroups of a group on the group and establishes some necessary and sufficient conditions for a group to be solvable .

讨论有限群的一类特殊极大子群的θ-子群偶对该群可解性的影响，得到若干充要条件，推广了该方面已有的一些结论。

Starting from the definition of almost normal subgroup , the author gives some interesting results about almost normal subgroups and the sufficient conditions for a finite group to be solvable.

利用几乎正规的定义对有限群G作了一些研究，得到了几乎正规子群的一些性质，并给出了有限群为可解群的几个充分条件。

By using the c-supplementation of Sylow 2-subgroup and Sylow 3-subgroup, we obtain two sufficient and necessary conditions for a finite group to be solvable.

利用Sylow 2-子群和Sylow 3-子群的c-可补性得到有限群成为可解的两个充要条件，推广了几个已知的定理。

In this paper, by using conditional cnormalityof some special subgroups(such as minimal subgroups, maximal subgroups, Sylowsubgroups, maximal subgroups of Sylow subgroups)of G, we obtain some sufficient or necessaryconditions for a finite group to be solvable, supersolvable, nilpotent. Some previouslyknown results are generalized.

本文结合有限群的某些特殊子群(如，极小子群，极大子群，Sylow子群，Sylow子群的极大子群)的条件c-正规性来研究有限群的可解性，超可解性，幂零性，得到了有限群可解，超可解，幂零的若干充分和充要条件，推广了有限群的一些结果。

Then, some criteria, i.e., the sufficient conditions, for the asymptotical stability of the system in form of mean square are given by linear matrix inequality, which can easily be checked by Matlab toolbox.

然后基于线性矩阵不等式技术，给出了时滞随机分布参数系统稳定的充分条件，所得到的结果表示成线性矩阵不等式的形式，所以易于验证。

You have to be cut off from a stressor for a sufficient amount of time to give your mind and body a break.

你必须要削减从一个足够的时间压力源关闭，让你的大脑和身体休息。

Firstly, a necessary and sufficient condition for an uncertain multi-channel descriptor system to be robustly stabilizable with a specified disturbance attenuation level is derived in terms of a strict nonlinear matrix inequality.

主要考虑分散H输出反馈控制问题。推导出了使不确定多通道奇异系统能鲁棒稳定且满足一定的性能指标的充分必要条件，没有等式约束的非线性矩阵不等式条件。

She is very pretty,but that is hardly sufficient reason for her to be so stuck up.

她非常漂亮，但这不足以成为她自负的理由。

Three sufficient conditions are given for pseudo-umbilical submanifold to be a totally umbilical submanifold in constant space.

给出了这种伪脐子流形是全脐子流形的3个充分条件。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失