英汉双语例句-生物医药大词典

The reason is that the results are unpredictable UNLESS you always group by a primary or candidate key value because you cannot know WHICH value from the non-grouped data will be selected.

中文意思：
这个原因是因为结果是不可预知的，除非你允许以主关键字或是候选关键字来作为分组，因为你无法知道WHICH将从哪能一个非分组的数据作选取。

以下为相关句子列表(点击查看，可以看对应的解释）：

	The reason is that our researchers know very little about the case study research method or worry that other researchers will comment unfavorably on the research.			究其原因，是因为人们对个案研究法不了解，或担心它的局限性会影响其他研究人员对自己研究的评价。
	The reason is that the edge of a burn perforation has decreased blood supply.			主要是因穿孔边缘有厉害的缺血所致。
	The reason is that the process of creating a document requires a lot of DOM calls, which slows things down.			原因是创建文档时需要有多次DOM调用，执行就会变慢。
	The reason is that the product you need has been out of stock.			其原因是，此货品在我处已经脱销。
	The reason is that the quality and function of current forest can not match the natural primeval forest with perfect soil conservation effectiveness.Because unitary surface material and less land surface roughness which can not retain runoff lead to short			原因是目前的森林质量和功能都无法与具有水土保持功能的原始森林相比，其地表组成物质太少且单一，地面粗糙度低，起不到对地表径流的阻挡作用，致使地面径流汇流时间缩短，洪水下泄快并容易形成洪水叠加，导致洪涝灾害加剧。
	The reason is that the results are unpredictable UNLESS you always group by a primary or candidate key value because you cannot know WHICH value from the non-grouped data will be selected.			这个原因是因为结果是不可预知的，除非你允许以主关键字或是候选关键字来作为分组，因为你无法知道WHICH将从哪能一个非分组的数据作选取。
	The reason is that their valence band is full of electrons, which obstructs current flow.			因为它们的价带填满了电子，使电流无法流动。
	The reason is that, besides the low level of productivity, there are many other subordinate sources such as rule vacuum and imperfect system resulting from system transformation, lag of democratic law system construction, various the different values, etc			究其根源，除了生产力水平总体落后这个主源外，还有体制转换形成的规则真空和制度漏洞、民主法制建设滞后、思想价值观念多元化等次源。
	The reason is the discovery, in 2004, of some peculiar seashells of that age in Blombos, a seaside cave in South Africa.			原因就是在2004年，在南非海边的一个洞穴，布隆伯斯洞中发现了一些罕见的海贝。
	The reason is this: By and large, Chinese housekeeping and building maintenance are far from the world's best.			原因在于：一般说来，中国人的家务料理以及对楼房的维护离世界最高水平还相差很远。
	The reason is, in the final analysis, he moves well enough to confirm his win.			理由是：在最后的分析中,他运动地很好地已经足够确定他的胜利。