无毒的

PFS attracts peoples attention by its remarkable coagulant performance, especially its harmlessness and innocuousness.

聚合硫酸铁以其良好的絮凝性能和无毒无害的优点倍受人们的关注。

Solid acid catalysts have been found to be useful catalyst in a variety of organic reactions. They have many advantages, such as non-toxic, inodorous, non-volatile; non-corrosive, non-pollution, mild reaction conditions, high yields and reactivity, excellent stability and simple work-up procedure, and these are what liquid catalysts cant replace.

固体酸催化剂在有机合成反应中应用广泛，这类催化剂无毒无味，不挥发，不污染环境，不腐蚀设备，容易回收，可重复使用，所催化的反应条件温和，产率和选择性高，后处理简便，且具有独特的催化性能，这些是液体催化剂所不能代替的。

A diverse range of bacteria can utilize these xenobiotics as substrates and mineralize them or convert them into harmless products, and help to clean up the environment.

一些微生物能够利用这些生物异源物质，将它们矿化或转化为无毒物质，同时净化了环境。对微生物降解异源污染物相关的基因，酶及代谢途径的研究逐渐加深，大大推动了微生物在环境污染治理方面的研究和应用。

Magnesium silicide (Mg2Si) is one kind of narrow-band-gap n-type semiconductor, and is a promising environmentally friendly thermoelectric material because of its high electrical conductivity and low thermal conductivity, and also because it is non-toxic and non-polluting.

硅化镁(Mg2Si)是一种窄带隙n-型半导体，具有高的电导率和低的热导率且无毒无污染、耐腐蚀，是很有潜力的环境友好型中温域热电材料。

We are also associated with the caterpillar kingdom before they become the butterfly or moth; along with millipedes, a small wormlike creature that is pinkish red in the islands and has a one hundred legs rather than one thousand, and are non-poisonous.

我们也和变成蝴蝶或飞蛾之前的毛虫王国有关，同样也和千足虫——岛上一种略带桃红色的、有着百条腿而不是千条腿的无毒小虫有关。

"Tinplate has the strength and formability of steel combined with the noncorrosive and nontoxic properties of tin, and additionally is easy to solder."

镀锡钢板具有钢的强度和可成形性、锡的耐腐蚀和无毒特性，此外还具有易于焊接的特点。

The composite protective coating was not only organic solvent free and innoxious but also colorless, transparent and nonluminous. It was effectively used for the protection of stone cultural relics, and it will be promising in the conservation of stone cultural relics.

这种新型防风化剂不含有机溶剂，无毒无味，利于环保；同时，它无色、透明、无光，能保持石质文物的本来面目，符合文物保护原则，具有广阔的应用前景，可以作为一种环保型防风化剂应用于石质文物的保护。

With the development of continuable world economy, the development trend of gravure printing is using the nonpoisonous environmental protection type of gravure ink.

随着世界经济的可持续化发展，使用无毒环保的凹印油墨已是凹版印刷发展的必然趋势。

Chitosan, a kind of natural polymer derived from arthropod shell, belongs to nonpoisonous and pollution-free security animal hormone substance.

天然聚合物壳聚糖是由节肢动物的外壳提取的、无毒、无污染的动物源激素物质。

The urgent task is to research and develop a new-type inorganic macromolecular flocculants of high-efficient, nonpoisonous and low-price, and this is an important subject being paid most attention in the worldwide water treatment at present.

研制和开发新型、高效、无毒、廉价的无机高分子絮凝剂成为水处理领域的一项迫切任务，是当前国内外水处理界关注的重要课题之一。

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。