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TNF-α can increase the expression of MMP-2 and MMP-9 and this increase can be counteracted by IFN-γ.

TNF-α对MMP-2和MMP-9的活性有增强效应，但IFN-γ的抑制MMP-2和MMP-9作用可以抵消TNF-α的增强效应。

After twenty-one days, they were challenged by white spot syndrome virus. The mortalities of crawfishes after challenged with WSSV of the same dilutions were negatively correlated with the the dose of Ig-Guard, that is, along with the increase of the dose of Ig-Guard, their mortalities were decline; The LD50 of the immune group was higher than the control group, further more, along with the increase of the dose of Ig-Guard, the effectes were obvious.

注射相同稀释浓度的螯虾，其死亡率与添加Ig-Guard的剂量呈负相关，即添加Ig-Guard剂量越高，其死亡率越低；免疫组螯虾的半数致死剂量(LD50)高于对照组的半数致死剂量，而且其效果随着免疫剂量的增加而越来越明显。

Comparing the contrast groups and irradiation groups, the irradiation groups were damnified so that the activity debased to different extent and with the increase of irradiation energy and time, the extent of activity debasing and death-ratio will increase gradually.

与对照组相比，照射试验组蝗蝻被照射部位受激光热损伤破坏，活性均有不同程度的降低，且随着激光剂量的增加和照射后时间的延长，活性降低程度和致死率呈现增长趋势。

ABSTRACT In order to study the thermally activated characteristics of plastic deformation and the effect of alloying element on the thermal activation of structural steels, the properties of plastic deformation for 20g and 13Ni3CrMoV steels have been examined in the temperature of 77—473K and strain rate of 〓. The experimental phenomena show that the effective stress of plastic deformation decreases with the increase of alloying elements content (namely solute solution softening) and the frequency factor deceases with the increase of effective stress.

本文以13Ni3CrMoV钢焊接结构的动态断裂破坏为背景，通过系统测试20g和13Ni3CrMoV钢的动态屈服特性，分析比较了结构钢的形变热激活特点，从频率因子〓随有效应力σ〓增大而下降和合金固溶软化的实验现象出发，在位错以弯折方式克服晶格Peierls位垒的基础上，提出了溶质原子与螺型位错热激活弯折相互作用的物理模型和σ〓-T分段线性关系的形变热激活理论假设，并借助计算机数值模拟，分析探讨了合金固溶软化的微观机制。

The flow stress decreases with the increase of deforming temperature and increases with the increase of strain rate.

流变应力随着变形速率的增加而增加，随着变形温度的升高而降低。

Research results indicate that the average soil stresses between piles increase first and then decrease with embanking time , but the average pile-top stresses increase continuously .

研究结果表明，桩间土平均应力随填土时间增加先增大后减小，而桩顶平均应力持续增大。

This decrease in consumer spending equates to an increase in savings, which leads to an increase in investments.

消费支出在减少，储蓄在增加，随之而来的便是投资的增加。

If one compounds that rate over ten years, they were expecting an increase of a factor of 2.5, and, if one extrapolates, a 2000-fold increase over the course of a lifetime.

照这么计算的话，10年之后的房价将是现在的2.5倍，如果用人的一生的时间来计算的话，将有2000倍的增幅。

In details, the strongest inhabitation to the shoot growth was observed when neutral soluble fractionates were supplied. The shoot biomass with neutral soluble fractionates added was decreased by 10.52% over the blank control, resulting in obvious increase of root: shoot ratio. It suggests that the root exudates would be self-poisonous. Besides, both acid and alkaline soluble fractionates exhibited the trend to increase the stem height and it is necessary to exploit the reasons.

在培养液中，分别加入分组的烤烟根系分泌物，均显著降低根系对NO_3~-、H_2PO_4~-、K~+离子的吸收和根系活力，推测根系分泌物中产生抑制作用的物质可作用在相当宽的pH范围；其中，碱溶性组分对H_2PO_4~-、酸溶性组分对K~+、中性组分对NO_3的吸收和根系活力的抑制作用较强，推测在烤烟根系分泌物中，可能存在多种抑制烤烟生K和养分吸收的化学物质；另外，抑制作用随着根系分泌物浓度的增加而增强。

To investigate the relationship between cytoskeleton and hypos motic membrane stretch-induced increase in muscarinic current,the role of actin microfilament in hyposmotic membrane stretc卜induced increase in muscarinic current was studied with the whole-cell patch clamp technique in guinea-pig gastric myocytes .

在急性分离的豚鼠胃窦平滑肌细胞上，利用膜片钳技术的传统全细胞模式记录离子电流的方法，探讨微丝在低渗牵张诱导毒覃碱电流增加中的作用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了