不存在

Under the conditions that the concrete expression of its singularities are not sloved,we discuss the bounded property of trajectories, separatrix configuration,nonexistence and existence of limit cycle.

对一类多分子反应模型x＝1－αx－xpyq，y＝βy（xpyq－1－1）进行定性分析，在第一象限奇点无法具体求出的条件下，讨论了轨线的有界性，分界线的位置关系以及极限环的存在性和不存在

Apparently as long as she, Vanity, in her solipsistic purity, did not believe the Southern boundary existed, then, for all practical purposes, it would not.

很明显，瓦妮特一直以来，在她的纯粹唯我主义观点中，并不相信南边界存在，然后，用实际的方法证明它不存在。

Secondly, according to the stem and leaf anatomy, leaf epidermis, pollen morphology and floral development, it is found that there are no close relations between Acorus and Typhales, especially in the aspect of floral development. In the course of floral development of A. calamus, neither bracteloe primordium nor common primordium occurs in the whole course. Early development of the flower is strongly unidirectional. Three shield carpels develop into a pistil. In Sparganium fallax, each female flower has a bracteole. The bracteole primordium and the floral primordium originate from a complex structure. A single saccate carpel develops into a pistil. In staminate flowers, petal and stamen primordia initiate spirally.

菖蒲属与香蒲目的茎叶解剖特征、叶表皮特征、花粉特征及花器官发生特点等亦存在着明显区别，特别是花器官发生特点差异尤为显著，如菖蒲属花器官发生过程中，没有苞片原基，也不存在任何形式的复合原基，花被与雄蕊原基均以单向性方式发生，雌蕊由3心皮发育而成，具有&盾状心皮&的特点等，黑三棱属则有苞片原基发生，且苞片原基与雌花原基起源于共同的复合结构，雄花的花被原基和雄蕊原基均以螺旋状方式发生，雌蕊由单心皮发育而成，未发现有2或3个心皮原基或其痕迹的现象，体现出&囊状心皮&的特点。

There is positive correlation between the industrial product, the input of fixed assets of various industies and the quantities of graduates, while unsignificant correlation between output, input and the employment rate of graduates and universities.

3不同产业的产出和固定资产投入与不同院校的毕业生数量存在一定程度的正相关；而不同产业的产出和投入与大学生就业率、院校就业率之间不存在显著的相关关系。

"Barbers don't exist because if they did, there would be no people with dirty long hair and untrimmed beards, like that man outside."

&理发师是不存在的，如果他们存在的话，就没有人会留有肮脏的长发和杂乱的胡须，好像外面的那个人。&

In addition, other chlorinated benzenes can be degraded with or without toluenes being present.

另外，在甲苯存在或不存在情况下，其它的氯化苯也可被降解。

"I'm not"As saw what he was thinking,the guy who has the blue eyes chuckles.

但有个哲人说过，这个世界上是不存在巧合的，所有的行动都能在日后被验证他们存在的必然性。

Those at 1800 will tend to have two subtle bodies that are engorged, and two that are barely present if not non-existent.

那些1800股者，将倾向于拥有2个过度充盈的精微体，而另外2个要么根本不存在，要么极少存在。

If we don't exist then, an abortion only prevents us from coming into being.

如果我们在那个时候不存在，那个时候的堕胎就仅仅是阻止我们的存在。

The iron oxides, if presence, accumulated themself mostly on the surfacelayer of slagged zone, formed an assemblage of reaction products and convertedinto two systems of ferro-spinels asA andF.

存在铁氧化物时，基本上吸附在渣蚀带表面，形成有两个尖晶石固溶体〔A和F〕系列的矿物共生组合，当不存在铁氧化物时，在渣蚀带生成纯MA。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。