微弱

An extremely weak photoelectric current examination circuit is designed in view of the stability and the noise problems. The circuit includes the filtering, phase compensation and so on.

针对微信号检测中的稳定性和噪声问题设计了一种极微弱光电流检测电路，包括滤波和相位补偿等功能。

According to the measurement demand of weak photoionization signal, a new kind of photoionization signal detection instrument is developed.

根据微弱光电离信号的检测需要，开发出光新型离子化信号检测仪。

Precise testing method of faint optical signal comes into being while multiplier phototube appears with low noise and high gain.

随着低噪声、高增益的光电倍增管的出现，比较精确地测量微弱光信号成为可能。

Precise testing method of faint photic signal comes into being while mulitplier phototube appears which has low noise and high gain.

随着低噪声、高增益的光电倍增管的出现，比较精确地测量微弱光信号成为可能，于是在此基础上提出了采用光电倍增管来测试像增强器噪声的方法，实验中发现这种方法能比较准确并直观地反映像增强器噪声大小。

The response to single compound: To both females and males, the compounds that elicit larger responses of adults are benzaldehyde, benzene acetaldehyde, hexanol,β-phenyl ethyl alcohol, benzyl alcohol, cyclohexanol and eugenol. Phytol, 2-methyl-cyclohexanone and β-caryophyllene reveal to have weaker activity.

对单一化合物的反应：两种昆虫，不论是雌蛾还是雄蛾，能引起较强EAG反应的化合物均为苯甲醛、苯乙醛、正己醇、β-苯乙醇、苯甲醇、环己醇和丁香酚，植醇、2-甲基环己烷和β-石竹烯仅能引起微弱的EAG反应。

In this paper the thymus DNA of calf and the pBs plasmid are the main objects of our studies in ultraweak luminescence. By means of PIAS(Photon-counting image acquisition), ultraweak luminescence detector and Lambda Bio 40 of UV/VIS spectrophotometer, we studied the UL of DNA induced by the three oxygen free radicals: singlet oxygen Oa, hydroxy radical and superoxide anion(O2 ). We found that the OH can greatly increase the UL intensity of DNA.

本论文以小牛胸腺DNA和质粒pBs为实验材料，利用光子图像探测系统(Photon-counting image acquistion，PIAS)、微弱发光测量仪和UV／VIS分光光度计和生物统计学的成组比较法原理对单线态氧(~1O_2)、羟自由基、超氧阴离子(O_2~-)三种氧自由基诱导DNA超弱发光的变化过程进行了研究，结果发现这三种氧自由基中·OH能诱导DNA的超弱发光发生显著的增强变化，而其他两种氧自由基对DNA的超弱发光并无显著诱导作用。

As I was leaving the Irishman's roof after the rain, bending my steps again to the pond, my haste to catch pickerel, wading in retired meadows, in sloughs and bog-holes, in forlorn and savage places, appeared for an instant trivial to me who had been sent to school and college; but as I ran down the hill toward the reddening west, with the rainbow over my shoulder, and some faint tinkling sounds borne to my ear through the cleansed air, from I know not what quarter, my Good Genius seemed to say —— Go fish and hunt far and wide day by day —— farther and wider —— and rest thee by many brooks and hearth-sides without misgiving.

雨后，当我离开了爱尔兰人的屋子，又跨步到湖边，涉水经过草原上的积水的泥坑和沼泽区的窟窿，经过荒凉的旷野，忽然有一阵子我觉得我急于去捕捉梭鱼的这种心情，对于我这个上过中学、进过大学的人，未免太猥琐了；可是我下了山，向着满天红霞的西方跑，一条长虹挑在我的肩上，微弱的铃声经过了明澈的空气传入我的耳中，我又似乎不知道从哪儿听到了我的守护神在对我说话了，——要天天都远远地出去渔猎，——越远越好，地域越宽广越好，——你就在许多的溪边，许许多多人家的炉边休息，根本不用担心。

It was then that my grandfather asked her if she had heard anything after theshot, and she answered that first she had heard a great silence, then the metallic sound of the picklock falling on the cement, and then a faint, anguished voice:"Mother, help me!"

就在那时，我爷爷问她，枪响之后她可曾听到了什么，她回答说首先她听到的是极度的沉寂，接着听到撬锁工具落到水泥地上，接着是一句微弱、痛苦的话："妈妈，救我！"

MMP25 may play an important role in embryo implantation and placentation.

蜕膜组织中MMP25主要在腺上皮细胞表达，自然流产组的表达微弱，两组平均光密度分别为0.25±0.13和0.21±0.12，差异有统计学意义(P＜0.05)。

To make comparison of adaptability of the plastid-less mutant and the wild type strain, we studied their growth characters under different culture conditions, found that the difference of their growth in a medium rich in organic substances are hardly detectable and that the loss of plastid exerts only a weak effect, if any, on the heterotrophic growth.

为比较完全失去质体结构的突变株和野生型的适应力，我们对二者在不同条件下的生长特性进行了研究，结果发现野生型与突变株的生长在有机质丰富的培养液中差别微弱，质体的丢失并不产生显著影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。