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In Chapter 4, we study the center conditions and the bifurcation of limit cycles at a degenerate singular point as well as that at infinity for a quintic polynomial system and prove that the system has 5 limit cycles around the origin and 2 limit cycles around infinity.

在第三章中，我们分别研究了一类三次多项式系统、一类五次多项式系统、一类七次多项式无穷远点的中心条件与极限环分支问题。

Polygamy has been around for centuries in many countries around the globe.

历史 一妻多夫在世界上许多国家已经存在了几个世纪了。

When Poon started her company, she looked for factories and suppliers around Shanghai to "lower the embodied energy of the product"(or use less energy trucking the stuff around).

当潘开始，她的公司，她期待的工厂和供应商靠近上海的"降低，体现了能源的产品"（或使用更少的能源运输东西左右）。

The land around them was perfectly still, glowing with a kind of preternatural light that allowed him to see and sense everything around him.

四周的大地是如此完美的寂静，被一种超自然的光芒照耀着，这光芒让他能看见和感觉到周围的一切。

Yet his mind was preternaturally active. His thoughts went ever around and around in a circle.

周围生活里每一件进入他感官的事物都立即和"作品早已完成"联系了起来。

Now offered through EDI, there are opportunities to build links with the education sector in Trinidad and Tobago whilst raising the prole of these products among the business community here and in the wider Caribbean.LCCI International Qualications are trusted and valued by universities, employers and professional bodies around the world. Every year around

而英国伦敦工商会国际职业资格认证的证书现由英国国际教育发展集团颁发，因此与特立尼达岛和多巴哥岛的教育部门建立合作关系赋有机遇，与此同时也可在当地及更多加勒比海国家中提升英国伦敦工商会的品牌形象。

The proportionality constant, H, is known as the Hubble constant and quantifies how fast space is stretching—not just around us but around any observer in the universe .

其中的比例常数H，就是所谓的哈伯常数，它可以把空间向外延伸的快慢予以量化，不只针对我们周遭，也适用于宇宙中所有观测者的周围。

As infants smile and sleep, we are rocked in the cradle of our wayward fancies, and lulled into security by the roar of the universe around us0we quaff the cup of life with eager haste without draining it, instead of which it only overflows the more-objects press around us, filling the mind with their magnitude and with the strong of desires that wait upon them, so that we have no room for the thoughts of death.

像婴儿带着微笑入睡，我们躺在用自己编织成的摇篮里，让大千世界的万籁之声催哄我们安然入梦；我们急切切，兴冲冲地畅饮生命之杯，怎么也不会饮干，反而好像永远是满满欲溢；森罗万象纷至沓来，各种欲望随之而生，使我们腾不出工夫想死亡。6小时掌握学英语的秘诀！——点击看答案

As infants smile and sleep,we are rocked in the cradle of our wayward fancies,and lulled into security by the roar of the universe around us.we quaff the cup of life with eager haste without draining it,instead of which it only overflows the more-objects press around us,filling the mind with their magnitude and with the strong of desires that wait upon them,so that we have no room for the thoughts of death.

像婴儿带着微笑入睡，我们躺在用自己编织成的摇篮里，让大千世界的万籁之声催哄我们安然入梦；我们急切切、兴冲冲地畅饮生命之杯，怎么也不会饮干，反而好像永远是满满欲溢；森罗万象纷至沓来，各种欲望随之而生，使我们腾不出工夫想死亡。楼主选读的文章都很好的。

As infants smile and sleep,we are rocked in the cradle of our wayward fancies,and lulled into security by the roar of the universe around us0we quaff the cup of life with eager haste without draining it,instead of which it only overflows the more-objects press around us,filling the mind with their magnitude and with the strong of desires that wait upon them,so that we have no room for the thoughts of

像婴儿带着微笑入睡，我们躺在用自己编织成的摇篮里，让大千世界的万籁之声催哄我们安然入梦；我们急切切，兴冲冲地畅饮生命之杯，怎么也不会饮干，反而好像永远是满满欲溢；森罗万象纷至沓来，各种欲望随之而生，使我们腾不出工夫想死亡。其实，我忘记了，这个世界本来是很大的！

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。