差别法

Numerical examples show that the least- squares images can be efficiently retrieved in a few iterations of conjugate gradients method.

数值实例表明，通过少数的共轭梯度法迭代，就能得到与真实模型差别很微小的偏移效果。

The flavor characteristics change of chicken bone hydrolysates with and without thermal inactivation was evaluated by paired comparison test and nine-point hedonic scale and identified by GC-MS.

采用差别成对比较和评分法评价了灭酶前后鸡骨风味的变化，采用GC-MS联用仪鉴定了灭酶前后鸡骨风味成分的差异，分析研究了鸡骨酶解过程中加热灭酶对产物风味的影响。

Results (1)The permillage of myocyte apoptosis in infarct area in elder patients with sudden death caused by AMI was significantly higher than that in control group(663.00‰±117.12‰ vs 34.30‰±20.68‰,P＜0 .01).However the permillage of myocyte apoptosis in 1-vessel,2-vessel,and 3 - vessel disease were 514.28±165.12‰,564.38‰±102.33‰ and 668.25‰±127. 19‰,respectiverly,significantly higher as compared to control group(All P＜ 0.01).But no significance was found among the three groups.(2)The size of DNA f ragment about 180～200 bp was found only in those patients with two and three ve ssels involoved.(3)The electron microscope showed the characteristics of myocyte apoptosis episodes,the others showed the characteristics of necrosis.

结果 TUNEL法发现，猝死者梗死区的心肌细胞凋亡千分数老年组(663.00‰±117.12‰)明显高于正常对照(34.30‰±20.68‰)(P＜0.001)；心肌细胞凋亡千分数在冠脉1支病变者(514.28‰±165.12‰)＜2支病变者(564.38‰±102.12‰)＜3支病变者(668.25‰±127.19‰)，虽然均明显高于正常对照(均P＜0.01)，但三组之间比较则无统计学上的差别(均P＞0.05)；冠脉2～3支病变者梗死区的心肌细胞DNA电泳可见相差约180～220 bp的阶梯片段；电镜发现猝死者梗死区内的心肌细胞核膜完整、染色质浓集、电子密度增加的凋亡特征，有的则出现核膜破裂、染色质溶解成碎屑的坏死现象。

Teeth were treated by one-visit root canal filling as experimental group.

一次法根管充填短期内引起急性反应比例与常规根管治疗术相比无明显差别。

In frictional contact system,emphasis is placed ondifference between coupled and uncoupled problems of normal-tangential contact.

在摩擦接触问题中，强调了法向、切向耦合与非耦合的差别。

The observation showed that sterile plants and fertile plants in the pollen mother cell stage is not very different, when microspore mother cells of male sterile plants enter meiosis period, it could form normal tetrad cell , tetrad cell is normal in early development stage, In the uninucleate microspore stage , tapetal cells were vacuolization, the microspores were extruded to the middle by tapetal cells.

本研究利用石蜡切片法，结合光学显微镜技术对樱桃萝卜核质互作雄性不育系的不育株和对应保持系可育株的花药发育过程进行细胞形态学观察，观察结果表明：不育株与可育株在花粉母细胞时期差别不大，不育株的花药小孢子母细胞进入减数分裂期后，可以正常的形成四分体，四分体前期发育正常，而在单核小孢子期绒毡层细胞出现液泡化，绒毡层细胞向中间挤压小孢子。

Intimal areas were measured using morphometric analysis of perfusion-fixed vein graft specimens, and intimal thickness was calculated using circumferential measurements. The SMC proliferation was studied by the immunohistochemical detection of proliferating cell nuclear antigen. Expression of MMP-2、MMP-9 mRNA in vein grafts and unoperated control Vein grafts was detected by reverse transcription polymerase chain reaction. Substrate gel zymography was used to determine the proteolytic activity.

分别行HE染色、Verhoeff弹性纤维染色观察组织病理变化，计算机病理图象分析系统测量新生内膜厚度及面积，免疫组织化学方法检测静脉壁增殖细胞核抗原表达以观察细胞增殖情况，半定量逆转录-聚合酶链反应检测静脉壁基质金属蛋白酶-2(MMP-2)和基质金属蛋白酶-9(MMP-9)mRNA的表达，明胶酶谱法检测MMP-2、MMP-9活性，比较各组之间的差别。

The difference of camptothecin content from young leaves of C. acuminate picked in different time at the same area was studied by HPLC.

方法］采用高效液相色谱法研究同一地区不同时间采摘的喜树嫩叶中的喜树碱含量差别。

The analysis of the mutants of amrA and amkA showed that the production of rifamycin SV had decreased about 10%-20%.

用双交换法在地中海拟无枝菌酸菌U32染色体上插入阿泊拉霉素抗性基因，成功地构建了了amrA，amkA和amrB基因的突变株，其中amrA，amkA基因突变株的菌丝形态与野生型U32之间有较明显的差别，在菌丝的末端形成卷曲或弯曲。

Methods:The edentulous patients of senile males and postmenopausal females were selected.All the edentulous subjects were divided into two groups according to the degree of RRR of mandibles: well-rounded ridge group and atrophied ridge group; The BMD of mandibular angle and coxofemoral region (femoral neck,trochanter,and wards triangle) of all subjects were measured by dual energy X-ray absorptiometry.The BMD were compared between well-rounded ridge group and atrophied ridge group in the same sex group.

将60岁以上男性和绝经后女性无牙颌患者依据下颌剩余牙槽嵴吸收程度分为丰满组和非丰满组；采用双能X线吸收法，测量全部研究对象右侧髋部与左侧下颌角的骨密度；在同性别组内对比丰满组和非丰满组间下颌角和髋部骨密度的差别。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。