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A value -base map may provide some useful de script ion, but the principle-centered compass provides invaluable vision and direction.

有价值的地图可提供有用的信息，但是严谨的罗盘却为我们提供非常重要的指南和方向。

Chap I reviews the development of Li-Ion battery and its charger, and describes the content of this design.

本文第一章回顾了锂离子电池及其充电电路的发展，并说明了本次设计的主要内容。

The most famous paper is Eric Raymond's The Cathedral and the Bazar, which while an excellent de script ion is also rather brief.

最著名的文章是Eric Raymond的"大教堂与市集"，这也是对开发源码的一个很好描述，而不只是总结。

Products have built-in fan and power supply, four / five beam ion wind output, wind speed continuously adjustable

产品具有内置风机和电源供应器；四/五束离子风输出，风速连续可调

As the increase using of lithium-ion battery, it is necessary and benefice to consider the recycling of the cells.

目前主要是应用湿法冶金技术回收电极材料中的有价金属，如锂、钴、镍等，另外随着锂离子电池的发展以及对之研究的深入，也开始对失效的电极材料进行修复的探索。

Olivine-type LiFePO4 are recently expected to have a bright future as a potential cathode material of large scale moveable lithium ion batteries for its high theoretical capacity(170 mAh/g)and voltage(about 3.5 V versus Li/Li+),good stability both at room temperature and high temperature,low cost and environmental benignancy.

橄榄石型LiFePO4具有170 mAh/g的理论比容量和约3.5 V的电压、较好的常温和高温稳定性、低廉的价格和优良的环保性能，有望作为大型移动式锂离子电池的正极材料。

The olivine lithium iron phosphate (LiFePO4) has the potential to be a new commercial cathode material for lithium ion battery due to its abundant resources,low cost,non-toxicity,environmental benignancy,high theoretical capacity,good thermal stability and excellent cycling performance.

橄榄石型磷酸铁锂正极材料具有原料来源丰富、价廉、无毒、环境友好、理论容量高、热稳定性和循环性能好等特点，有望成为新一代锂离子电池正极材料。

In the four EDTB metal complexes the central ion is coordinated by four benzimidazole N atoms and two amine N atoms.

晶体解析表明EDTB-Cu和EDTB-Ni配合物中，中心离子分别与四个苯并咪唑氮和两个氨基氮配位，Cu

Benzoin condensation reaction is usually promoted by toxic cyanide ion, so the development of more convenient and efficient synthetic methods, which is environmental benign, is highly desired.

传统上，苯偶姻通过使用剧毒的氰化钠或氰化钾催化安息香缩合反应而得，所以苯偶姻的简单高效和对环境无污染的制备方法很有意义。

The optimal separating condition of chromatography analysis was: Shimadzu VP-ODS 150mm4.6mm as chromatographic column; acetonitrile/water (12/88,V/V, Contained 1.25mmol/l phosphoric acid) as mobile phase with flow rate of 1.0ml/min. Macroporous ion exchange resins and activated carbon were applied to enrich the trace level impurities and the main impurities was determined by LC-MS and GC-MS.They were : Benzonitrile , 2-Methyl-8-hydroxyquinoline, 2,6-Pyridinediamine , O-ethyloxime Cyclo-hexanone and compound with 220 molecular weight .

采用离子树脂和活性炭吸附富集这些微量的杂质，并通过液质联用和气质联用对杂质进行了定性分析，鉴定了影响290nm吸收的主要杂质为苯甲腈，2甲基-8羟基喹啉，2，6二氨基吡啶，O-乙基环己酮肟和分子量220的物质。

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。