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In the case that there is no a priori knowledge of the upper bound and lower bound of the unknown parameters, the switching adaptive control design approach is presented.

在非线性系统中未知参数的边界值未知的情况下，提出了切换自适应控制设计方法。

Several years ago a rare species of bird for some unknown reason .

几年前，因为某种无人知晓的原因，这种稀有的鸟绝迹了。

Monogamy (only one sexual partner in a lifetime) seems to be central to a stable marriage; just as infidelity within marriage breaks the belonging, so, too, does infidelity to the future husband before marriage, even if then he is unknown.

一夫一妻似乎是中央的对稳定的婚姻；正无宗教信仰在婚姻之内打破属于同样，如此，做无宗教信仰对未婚夫在婚姻之前，既使他然后是未知的。

Her father was taken aback because this area was unknown to him and to her.

他的爸爸吓了一跳，因为这个地区对他和他的女儿并不熟悉。

The titter that rippled around the room appeared to abash the boy, but in reality that result was caused rather more by his worshipful awe of his unknown idol and the dread pleasure that lay in his high good fortune.

但实际上，他脸红是因为崇拜那位素不相识的女孩，还有幸能和她同桌。他在松木板凳的一头坐下来，那女孩子一仰头，身子往另一头移了移。

Whether aspirin might be more beneficial for fully compliant patients with a low ABI is unknown from this study.

无论阿司匹林可能会更有利于完全兼容的患者低是未知的这项研究ABI读数。

To negate and even tease those so called dignified value, showing his high self-respect and self-esteem even in the danger ; to reveal and abominate the fraud, tricks, developing a sort of unyielding and dismal quality that a hero has at his end ; to neglect and ridicule the high capitalism modern cities and hot primary matters , having a calm and placid attitude to handle with the messy and complicated world ; to hope for and trust the mysterious information and secert in space (something fabled and subconscious ), being curious about the unknown ; to show solicitude for a certain transient psychic phenomena and to expand it, reflecting the open heart and rakish spirit going beyong the mortal world ; to be indifferent to the interest of substance ; to refuse the philistinism and to recall the the past lifestyle in the countryside and so on.

主人公身上，恐怕有这样几点需加以注意：对冠冕堂皇所谓有值存在的否定和戏弄，有一种风雨飘摇中御舟独行的自尊与傲骨；对伪善、狡诈行径的揭露和憎恶，有一种英雄末路的不屈与悲凉；对"高度资本主义化"的现代都市、对重大事件的无视和揶揄，有一种应付纷繁世界的淡定与从容；对大约来自宇宙的神秘信息、默契的希冀和信赖，有一种对未知世界的好奇与梦想；对某种稍纵即逝的心理机微的关注和引申，有一种流转不居的豁达与洒脱；以及对物质利益的淡漠，对世俗、庸众的拒斥，对往日故乡的张望等等。

For a two-dimensional type map, both abscissa and ordinate of the map are two unknown parameters of the linkage. A map is then composed of several regions that represent different types.

於二维类型图中，以连杆组中两个尚待决定的尺寸为图面座标轴，再於图面上区分出代表各种类型的区域。

When addressing himself to any particular church, even be it at the time still a stranger to him as, for instance, Rome or Coloss Colossae,aelig;, the Apostle always assumes a personal tone; hence the abstract and general manner in which he treats his subject from the beginning to the end of the Epistle to the Ephesians can best be accounted for by beholding in this Epistle a circular letter to a group of churches still unknown to Paul.

在谈到自己的任何特别的教堂，即使是在当时还是一个陌生人给他，例如，罗马或Coloss Colossae ， aelig ；，使徒总是假定个人基调，因此，抽象的，一般以何种方式对待他其主题从开始到结束的书信的以弗所，才能最好地占了看见在这书信通函的一组教堂仍然不明保罗。

Imagine a system with some unknown acceleration of gravity.

想象一下，这些不同的重力加速度对一个系统的影响吧。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。