可能的原因

During denuded mice oocyte mature process in vitro, the cortical granulesmay have abnormal numbers or generation problems. This may be another reason thatmakes denude oocytes matured in vitro have a clearly deficiency on fertilization invitro.

3去除卵丘细胞的小鼠卵母细胞在体外成熟过程中，皮质颗粒可能存在继发性生成障碍或者数量异常，该结果可能是去除卵丘细胞的小鼠卵母细胞存在体外受精障碍的原因之一。

Statistical evaluation was performed by using x~2 test and Fishers exact test for enumeration data and independent t test for measurement data to assess relationship of methylation between pancreatic neoplasm.

在从胰腺炎、IPMN至胰腺癌的进程中，NPTX2基因高甲基化阳性率逐渐加深，提示NPTX2基因可能参与胰腺癌进展，其高甲基化导致的基因沉默可能是导致胰腺癌的原因之一。

The decline of VEGF may induce the decrease of circulating EPC and be involved in the occurrence and development of coronary heart diseases.

VEGF的下降可能是导致血循环中EPCS的减少的原因，可能参与了冠心病的发生和发展。

The homology of the nucleotide sequences and genetic variation analysis of NDV strains suggested that mere were obvious divergence in gene lever among NDV vaccine strains and epizootic strains isolated from different areas and different ages.The divergence may have effect on amino acid and structure and function of protein in some extent and lead to difference of immunogenicity ,which was one of reason being difficult in preventing from ND.

通过对NDV F基因核苷酸序列同源性比较及遗传变异分析发现：我国不同年代、不同地区分离的NDV毒株与疫苗毒株之间在基因水平上存在较大差异，这种差异对氨基酸及蛋白质的结构和功能可能会有一定影响，而NDVF蛋白的差异同时也造成免疫原性的差异，这很可能是新城疫的免疫防治十分困难的原因之一。

The author needs to reconsider all these reasons, otherwise, his or her conclusion is not unconvincing.

婴儿的紧张可能是因为对于环境的不适应，也可能是由于生理上的原因。

We suggest that isolated posterior urethral injury is one of the causes of male coital trauma, which might be asymptomatic when the penis is flaccid but show symptomatic bleeding when the penis is erect.

我们认为单一的后尿道损伤也可能是性行为后外伤的原因，在阴茎未勃起状态下可能毫无症状，而阴茎勃起后才开始有出血的症状。

MTT assay indicated that anti-proliferative activities in HeLa, SHIN3, HOAC-21 and HAC-2 cell lines were closely related to structure, 1,10-seco of eudesmane sesquiterpene lactone resulted in reduced anti-proliferative activity. The anti-tumor activity of isoalantolactone was probably achieved by inducing HeLa cell apoptosis.

提示A-环开环可能是导致桉叶烷型倍半萜内酯的体外抑制肿瘤细胞增殖作用消失或减弱的原因；异土木香内酯抑制肿瘤细胞增殖作用有可能是通过诱导肿瘤细胞凋亡机制而实现的。

Analyzing calmly, we find that, besides market economy, the reasons for the prosperity even involve the satisfaction of showing-off desire, star dreams and the determinant desire of the public and the relevation of ugliness. At the same time, there are some dangers behind the phenomenon-the lack of the thinking of the populace, the possibility for super women to become slaves, and the confusion or even shift of beauty and the ugliness.

冷静分析，不难发现，超级女声的火爆除其市场经济的原因外，也有超女的表现欲、明星梦以及大众的决定欲及审丑欲得到满足的原因，而其狂欢的背后也潜藏着令人担忧的危险―大众理性思考的缺失，超女们沦为工具的可能，美丑边界模糊甚或移位。

The results indicated that the lignified seed shell had a negative impact on water permeability of seeds,but it was not the main reason for seed dormancy.

结果表明：(1)美国桂花种子木质化种壳对种子的吸水透性有一定的阻碍作用，但不是引起种子休眠的主要原因；(2)美国桂花种子的胚没有休眠，离体胚在光照培养7 d开始萌动；(3)胚乳被严密包裹的机械作用使胚无法获得萌发所必需的水分和氧气，这可能是导致种子休眠的最主要的原因。

The possiblehost objective reason all is very many, but, our country numericalcontrol engine bed function part development backwardness -- varietyfew, unit technical level low, performance quality insufficientlystable, the cost stays at a high level, the delivery insufficientlywas prompt and so on -- not to be able to satisfy the numericalcontrol engine bed main engine product need to develop, had noalternative but to say was most direct, the most main reason, Becauseall numerical controls engine bed all is by each kind of function part(including host 轴头, straight line rolls guide rail, ball bearingguide screw vice-, numerical control tool rest, knife storehousemanipulator, rotary table, numerical control servosystem, surveyfeedback as well as safe protective equipment and so on), the functionpart which on foundation rack and so on the lathe bed, column thecollection attire becomes is the numerical control engine bedimportant component, moreover is the indispensable part.

可能主客观原因都是很多的，但是，我国数控机床功能部件的发展落后──品种少，单元技术水平低，性能质量不够稳定，成本居高不下，交货不够及时等──满足不了数控机床主机产品发展的需要，不能不说是最直接、最主要的原因，因为所有的数控机床都是由各种功能部件（包括主轴头、直线滚动导轨、滚珠丝杠副、数控刀架、刀库机械手、回转工作台、数控伺服系统、测量反馈以及安全防护装置等）在床身、立柱等基础机架上集装而成的，功能部件是数控机床的重要组成部份，而且是不可或缺的部份。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。