The essential condition for the decay of the vacuum is the presence of an intense electric field.
真空衰变的基本条件是存在强电场。
The obvious difference is the presence of the Handler.
明显的差异是Handler的存在。
The triumphant glow within the spirit of man is the presence of God.
人类灵性之内的胜利辉光是上帝的临在。
A third reason for choosing Ohio is the presence of decent universities nearby.
选址的原因之三是因为附近的高等学府。
One very useful feature in Android is the presence of a local relational database.
Android中一个非常有用的特征就是存在本地关系数据库。
Another common theme in each of Xiaonan's paintings is the presence of a pathway.
小南的画作另一个常见的主题是步道。
One last important point about the DBManager class is the presence of the close method.
关于dbmanager类的最后一个要点是提供close方法。
Another sign of ice is the presence of parallel lines and pitted material on the crater floor.
另外一个有冰存在的迹象就是陨石坑底部的并行线和无核物质。
The first difference is the presence of a <xenc:EncryptedKey> element in the security header.
第一个不同是在安全头部中出现了 <xenc:EncryptedKey>元素。
A common pathophysiologic feature of affected areas is the presence of thermoregulatory vessels.
这些受累部位的共同病理生理特征是存在温度调节性血管。
One is the salt content of the water. Another is the presence of predators that attack the fish.
一个是水中的盐的含量，另一个是攻击鱼的食肉动物的出现。
The characteristic feature is the presence of "tubers" which are enlarged and firm, whitened gyri.
组织学上的特征表现为出现结节，它是扩大、变硬、变白的脑回。
Is the presence of squamous or trophoblastic cells in the maternal circulation pathognomonic for AFE?
母体循环中存在鳞状上皮和滋养层细胞是否为afe的特异性指标？
The special feature of the new product which received designation ML22P80X, is the presence of the programmed memory.
特别功能的新产品，其中所收到的指定ml 22p80x，是在场的编程记忆体。
The reason so much ozone has been lost over the arctic and Antarctic is the presence of chlorine in the upper atmosphere.
北极和南极有如此多臭氧丧失的原因是因为大气上层存在的氯。
Another is the presence of predators that attack the fish. Still another is the amount of fishing that takes place in the area.
另一个是海水中捕食者的存在会威胁鱼类的生命，而发生在此区域中捕鱼活动的总量也是原因之一。
What makes a function a generator factory in Python 2.2 + is the presence of one or more yield statements somewhere in its body.
在Python 2.2 +中使函数成为生成器工厂是它主体某处的一个或多个yield语句。
The one thing that common to each of these industry verticals is the presence of industry standards, specifically data format standards.
这些行业纵向市场的一个共同之处就是行业标准的存在，特别是数据格式标准。
So silent and constant is the presence of the sea that I may go most of a day without observing it, or even registering that it is there.
大海是如此长久地沉默着，使得我一天中的大部分时间都没有注意观察它，或是甚至没有留意到它就在那儿。
A striking feature of some of the current outbreaks is the presence of diarrhoea or vomiting in as many as 25% of cases. This is unusual.
目前病毒感染的显著特征是腹泻和呕吐，25%的病例中有这种情况，这是不正常的。
But a crucial factor in their success is the presence of big German manufacturers, each of which carries a long supply chain of smaller companies.
但是这其中的一个关键因素是每一家大型德国制造商都带动着一条长长的小公司供应链。
What generally distinguishes "a" grade wood from "AA" grade is the presence of some slight color in the wood and some variation in the uniformity of texture.
级和AA级木材的区别在于：A级木材存在一些颜色的轻微变化，木材结构的均匀度有一些变化。
One of the key characteristics of the hazardous pattern of drinking is the presence of heavy drinking occasions, defined as consumptions of 60 or more grams of pure alcohol.
大量饮酒(指饮用60克或60克以上纯酒精)是有害饮酒模式的一个主要特点。
After all, the main difference between a liberated iPhone and a non-jailbroken iPhone is the presence of an unofficial distribution channel (Cydia or Installer) and the rest of *nix.
毕竟，破解过的iphone和没有破解的iphone之间主要的区别是非官方发布渠道的存在和*nix的剩余。
Surgical orbital decompression is reserved for those patients in which vision is threatened, where there is the presence of severe cosmetic deformity, or failure of medical management.
外科减压术被用于那些视觉受威胁的患者、出现严重的美容畸形、或治疗失败的患者。
The somewhat acid flavour is caused by the presence of lactic acid.
略有的酸味是由乳酸的存在造成的。
In usual materials, one finds an inverse relation between the two properties, whereas for many practical applications simultaneous presence of both properties is desirable.
在通常的材料中，人们会发现这两种性质之间的反比关系，而在许多实际应用中，同时存在这两种性质是可取的。
The spruce community is not substantially affected by either the presence or absence of moose.
无论驼鹿的存在与否，云杉群落都不会受到实质性的影响。
The spruce community is not substantially affected by either the presence or absence of moose.
无论驼鹿的存在与否，云杉群落都不会受到实质性的影响。
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