某些项目抵扣，例如医疗或者雇佣相关的费用，只有当它们超过一定的数目时才可以抵减。
Certain itemized deductions, such as medical or employment related expenses, are only deductible if they exceed a certain amount.
无论是动物还是植物，其细胞核内的染色体，不仅具有一定的数目，而且还有一定的形状。
No matter what plant or animal, the chromosome in its karyon has a certain number and shape.
这种做法在那些刚刚开始创业的人群中非常流行，因为租用办公室、添置家俱以及雇人保洁都是一笔一定的数目价不低的支出。
The arrangement is particularly popular among those just starting out since leasing a commercial space, outfitting it with furniture and keeping it clean can be costly.
实际上，需要对分区数目进行一定的考虑。
In reality, the number of partitions should be given some thought.
处于早期阶段的果蝇神经细胞不一定了解周围细胞的数目，但是他们能够发育成合理分布的感觉硬毛。
Young fruit fly nerve cells don't necessarily know how many cells are in their neighborhood, yet they manage to develop into appropriately distributed sensory bristles.
每个RAID阵列的数据驱动器数目的确定可能相当复杂，因为一个阵列中的驱动器数目并不一定等于进行数据填充的驱动器数目。
Deciding on the number of data drives for each RAID array can be rather complex, since the number of drives in an array is not necessarily equal to the number of drives in which data is populated.
然而，报告指出研究发表文章数目的增长并不一定意味着质量的增加。
However the report points out that a growing volume of research publications does not necessarily mean in increase in quality.
根据量子力学的法则，核子外部一定数目的核外电子以一定的圆周轨道运行形成球状壳结构。
Under the laws of quantum mechanics, the nuclei of atoms have shell-like structures analogous to the spheres in which given Numbers of electrons exist in certain orbits around the nucleus.
新的移民要求对学院的人员配置数目产生了一定的影响，像世界排名第十位英国的剑桥大学贾吉商学院。
The new immigration requirements have had an impact on placement Numbers at schools like the U.K. 's Judge Business school, No. 10 in our international ranking.
新的移民要求对学院的人员配置数目产生了一定的影响，像世界排名第十位英国的剑桥大学贾吉商学院。
The new immigration requirements have had an impact on placement Numbers at schools like the U. K. 's Judge Business school, No. 10 in our international ranking.
“这将是巨大的进步”，泰恩河畔纽卡斯尔医院的心脏外科顾问医生LeslieHamilton说，“就一定的病人数目，可供移植的心脏的数目是有限的。
“These are tremendous advances, ” said Leslie Hamilton, consultant cardiac surgeon at Freeman Hospital in Newcastle upon Tyne. “Transplantation is limited to a fixed number of patients.
应该指出，数理统计的结果具有一定的代表性，但是这一结果受到样本的数目和质量的控制。
It should be pointed out that the results of mathematical statistics have a certain representation, but it is restricted by the quantity and quality of samples.
田间测墒时，点与点之间的距离要均匀，取样数目可以根据一定的置信水平、估值精度、变异系数做估算。
Distance between dots should be uniform in the field measurement. Sampling number should be estimated by certain believe level, estimate accuracy and variance coefficient.
更多选择不一定更好：研究表明，对美食果酱的调查发现当选择数目更少，人们会更快乐，甚至动力更大。
More choice is often not better: Research with gourmet jams has found people can be happier, and even better motivated, when they have fewer options to choose from.
注： 在计算你的所需睡眠数目之前，一定看一看我上一个题为“更好睡眠须知”的帖子。
Note: Before calculating your hours of sleep needed, be sure to review my previous post on do's and dont's for better sleep.
结果表明：对于一定的混杂复合材料，弯曲强度随着某一位置层错数目的减少而增加；
The result shows that, for a definite hybrid composite, the bending strength increases as the numbers of the plies drop-off at a station reduce.
并且按一定的精度和置信水平确定了这两项的合理取样数目。
The rational sampling number was determined in a given precision at a known confidence level.
但是染色体形态，如臂比值和次缢痕的位置和数目存在一定差异。
They differ from each other both in chromosome shapes and the positions of secondary constrictions.
岩石是充满随机分布的微裂纹的介质，其数目及尺寸服从一定的分布。
Rocks are mediums of full randomly distributed cracks, their number and sizes follow definite distributions statistically.
取样间距对合理取样数目具有一定的影响，合理取样数目分别为：有机质（24）、全氮（34）、全磷（10）。
The reasonable sampling numbers for soil organic matter, total N and total P were 24,34 and 10 respectively.
根据ISSR遗传相似系数划分的类群主要同染色体数目有关，也与地理分布有一定关系。
The species divided according to ISSR genetic similarity factors are mainly associated with chromosome number and to some extent with their geographic distribution.
若存cmg系统中的声码器单板上运行这种改进的EVRC编解码算法，在支持相同数目的EVRC编解码器的情况下，能为系统节省一定的DSP数量。
If this codec is utilized on the vocoder board in the CMG system, with the same number of EVRC sustained, we can reduce quite a few DSPs.
或比如说你想要签一个契约，赌内布拉斯加州2020年双胞胎出生的数目，没有问题，只要你肯出价，保证你一定找得到有人肯跟你对赌。
Or say you want to write a contract speculating on the number of twins to be born in Nebraska in 2020. No problem at a price, you will easily find an obliging counterparty.
在软件测试中，即使对中小规模的软件，要想达到一定的测试覆盖要求，生成的测试用例数目都可能非常惊人。
In software testing, even for the small or medium-sized software, to reach some test coverage requirements, the number of test cases can be very large.
这些数目字代表了动脉瘤并发症的终生风险，也就是一定大小的动脉瘤出现破裂或剥离的机率有多高。
These Numbers represent a lifetime risk of complication: the chance that an aneurysm of a given size will rupture or dissect, although the figures do not indicate when the crisis will happen.
搜索时，每一次迭代均以一定的替代率用一分群中若干优势微粒取代另一分群中相同数目的劣势微粒。
Each iteration, some bad particles of one sub-swarm are replaced with some good particles of another under a substituting probability.
很难证实，有多少起致命的车祸是由于驾驶员瞌睡引起的，但是，我相信，这个数目一定不小。
It is hard to prove how many fatal car accidents are caused by the driver's falling asleep, but my conviction is that the number is high.
很难证实，有多少起致命的车祸是由于驾驶员瞌睡引起的，但是，我相信，这个数目一定不小。
It is hard to prove how many fatal car accidents are caused by the driver's falling asleep, but my conviction is that the number is high.
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