A necessary and sufficient condition of the existence of the quadrilateral hyperbolic separatrix cycles for the cubic system E_3~ 1

Examples of one double limit cycle or two single limit cycles jumping from an infinite Separatrix Cycle in a quadratic system

二次系统的二重极限环和以无限大分界线环分支出两个极限环的例子

The ship sailed along the coast.

这艘船沿着海岸驶去.

Achill Island is the largest island off the west coast of Ireland.

阿奇尔岛是爱尔兰西部最大的岛屿.

Flying along the east coast of China, you can see many islands.

沿着中国的东海岸飞行, 你可以看到许多岛屿.

Small craft took shelter along the east coast during the storm.

小船靠在东部海岸躲避暴风雨.

He lives on the east coast.

他住在东部海岸地区.

Faber was getting out via the east coast.

费伯正设法从东海岸出境.

To achieve an empirical study of FDI in eastern coastal region and western region.

西部地区如何发挥自身优势以缩小在吸引外资上同东部沿海地区差距是需要研究解决的问题.

Whales are found in open seas throughout the world and occasionally in coastal waters, as well.

几乎在世界的海域中都找得到鲸的踪影,它们偶尔也会栖息于沿海水域.

Introduction to special section: Transport and transformation of biogeochemically important materials in coastal waters.

专门介绍: 在沿海水域的生物地球化学重要物质的输运和转换.

I fished in coastal waters.

我在近海水域捕鱼.

The fish are on sale from our own coastal waters.

出售的鱼来自我们自己的近海水域。

She is located in beautiful scenery of the world-famous summertime coastal city of Beidaihe beach.

她地处风光旖旎的世界著名沿海消夏城市北戴河海滨.

Is it a coastal city?

它是个海滨城市 吗 ?

Is a coastal city modernization.

是一座沿海现代化大城市.

I think San Diego is a sunny coastal city.

我认为圣地亚哥是个阳光迷人的海滨城市.

I like the coastal city-what a life to settle here!

我喜欢这个海滨城市,住在这儿生活会多好 啊 .

Wenzhou is a coastal city with a long history.

旁白:温州是一座历史悠久的沿海城市.

Dalian is a coastal city full of the flavor of modernity.

大连是一座充满现代气息的滨海城市.

It is coastal city, has soft long coast line and fine pier.

它是个沿海城市, 有绵长的海岸线,优良的码头.