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Methods Rabbit pulmonary alveolar macrophages were cultured in vitro. The cell death rate, the malandialdehyde, lactate dehydrogenate and superoxide dismitase contents in the cultured cells were determined at different incubation time and different dose of chrysotile asbestos for the cytotoxicity of the material.

采用体外细胞培养技术，以兔肺泡巨噬细胞死亡率、乳酸脱氢酶、超氧化物歧化酶活力及丙二醛含量变化来表示不同剂量、不同培养时间的纤状蛇纹石石棉对巨噬细胞的毒性。

CMA, as an alternate deicer, tends to inhibit corrosion and appears to be relatively harmless to the environment. But CMA is expensive because of the high price of its material, and it has less ability in melting ice than sodium chloride. Besides these, CMA sticks to wet surfaces and can congeal to form hard chunks, difficult to store for a long time, dusty and a strong vinegar smell when spread.

而CMA是对氯化物盐除冰剂的重大改进，CMA具有无污染，环保的特点，对金属几乎无腐蚀，但由于原料价格昂贵，使得CMA的价格不菲，CMA对冰的融化能力不如氯化钠，CMA易结块，不宜长期储藏，在撒布时形成的粉尘及刺鼻的酸味亦是需要改进的地方。

In order to determine the optimal conditions of water glass from oil shale ash, through orthogonal experiment, the influences of correlative parameters including NaOH concentration, material ratio (NaOH to oil shale ash in weight), reaction time and reaction temperature on the modulus of water glass or deliquescent rate of SiO2 were all studied.

为研究页岩灰制取水玻璃的最佳条件，分别以水玻璃模数和页岩灰中SiO2溶出率为指标，NaOH溶液质量分数、物料比（NaOH溶液与页岩灰的质量比）、碱浸时间和碱浸温度为影响因素。进行了正交试验。

for long time, the primary school living to the writing widespread existence "sorrow, afraid, be disgusted with" of thought.but the composition teaching of tradition, the teacher set question from the composition, purpose, choose a material, row to lift a key link to the workbook to review to change, whole one person contract for and resulted in thus student can according to teacher design good"diagram paper" lay bricks, the composition contents be deceitful and empty and lack a kid true, monotonous phenomenon, complete deprival student's workbook of independence power.in fact, composition's being not only be the operation of the language sign.left a person of development, left life, composition will is have no the wood of origin, have no source of water.

长期以来，小学生对写作普遍存在着"愁、怕、厌"的思想。而传统的作文教学，教师从作文命题、立意、选材、列提纲到习作评改，全一人包揽，从而造成了学生只能按教师设计好的"图纸"砌砖，作文内容虚假、空洞，缺乏童真，千篇一律的现象，完全剥夺了学生习作的自主权。其实，作文并非仅是语言符号的操作。离开了人的发展，离开了生活，作文就将是无本之木，无源之水。

For the first time this allows a robotic application to accurately gauge height, depth and surface contours, opening new possibilities for material management.

对于首次允许机器人应用准确地衡量高度，深度和表面的轮廓，开辟了物资管理的新的可能性。

For a long period of time, widely used in the production of components of an effective insecticide rotenone is mainly from the genus Derris root extract, collect rotenone from the root to dig down to two meters deep, the human cost of not only high-cost and easy caused by soil erosion, many of the genus Derris production has stopped growing, leading to the market with rotenone as the main active ingredient of the biological pesticide manufacturers shortage of raw material sources.

相当长一段时间，在生产上广泛使用的有效杀虫成分鱼藤酮主要是从鱼藤属植物中的根部提取，采集鱼藤酮的根要挖掘至地下达两米深，不仅人力成本耗费高，而且容易造成水土流失，不少鱼藤属植物的产区已经停止种植，导致市场上以鱼藤酮为主要活性成分的生物农药制造企业原料来源短缺。

The basic connotation of the"aesthetic utilitarianism"is that aesthetics has an intrinsic function to surpass the desire of secular utilitarian purposes, and that the employment of aesthetic education makes it possible to liberate and sublimate the basic instinct and emotion of the fellow countrymen through the "detachedness"and"universality"of aesthetics, with a view to repelling the material and selfish desires and to formulate in time a complete character and a noble morality.

审美功利主义"是吸收了西方"审美无利害性观念和中国古代儒家、道家的思想，又结合当时所面临的启蒙问题而形成的。

The machine applies Faraday magnetic conductivity principle for the first time, utilizes the difference between oxygen of air andnitrogen, paramagnetism of oxygen and diamagnetism of nitrogen principles and adopted high-performance rare-earth permanent-magnet material, which creates 18 proprietary technologies that take polyoxier and helimagnetizer as core.

该机首次应用法拉弟导磁性原理，利用空气中氧、氮磁性之差，即氧的顺磁性和氮的抗磁性原理。采用高性能稀土永磁材料，创造了以"聚氧器"和"螺旋磁化器"为核心的16项专有技术。聚氧器利用氧的顺磁性，采用高梯度强磁场富聚空气中的氧，同时设有与离心叶轮同步高速旋转的双向扫射磁场，对富聚的氧予以充分的激活。

In order to exploit this effect to enhance diffraction efficiency, experiments of non-continuous holographic exposure were designed and conducted, The diffusion time constant of the material was obtained to be 21 s by fitting the experimental data of dark enhancement with theoretical model.

为了利用暗增长过程提高衍射效率，设计并实施了非连续曝光实验，使曝光与暗增长过程交替进行。

For long time in our country the main source of the raw material was Dioscorea nipponica Makino in wild.

长期以来我国穿山龙的原料主要来源于野生。

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。