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It is believed that it is a promising alternative for thermionic cathode and field emission cathode. Since 90s 20th century, many important progresses in ferroelectrics cathode have been made. With the researches on the theory and experiments of this field, many new ferroelectrics devices will come into being and will have important usages in high-tech domain.

自20世纪90年代以来，铁电阴极材料及应用研究取得了许多意义重大的研究进展，随着电子发射机理研究的进一步深入，以及新铁电阴极材料制备技术和电子发射技术的进一步发展，完全可以期望在不久的将来就会有各种新型铁电电子发射器件在不同的高新技术领域发挥重要的作用。

One is a slim embrasure from which archers perhaps defended Tristan l'Hermite's son when his angry peasants revolted; the other is a low square window protected by medieval iron bars cut roughly into stems with drooping leaves.

其中一个是细窄的箭眼，弓箭手可以在这里保护特利斯坦·勒尔米特的少爷，防止愤怒的农民造反时闯进来。另一个是低矮的方形窗户，装上了中世纪的粗壮铁栅，铁栅上还有下垂的叶状铁刺。

One is a slim embrasure from which archers perhaps defended Tristan lapos;Hermite's son when his angry peasants revolted; the other is a low square window protected by medieval iron bars cut roughly into stems with drooping leaves.

其中一个是细窄的箭眼，弓箭手可以在这里保护特利斯坦·勒尔米特的少爷，防止愤怒的农民造反时闯进来。另一个是低矮的方形窗户，装上了中世纪的粗壮铁栅，铁栅上还有下垂的叶状铁刺。

In the present paper,the goal applies in the development in the mixed style battery cocurrent of motor driver design in the electrically operated bicycle,the use lead-acid battery and the LiFePO4 battery takes the main actuation power to originate,the iron phosphate lithium battery has the life to be long,the electric discharge power is big and the transformation power suits the high electric current product good the characteristic;The lead-acid battery is in a market condition the quite mature battery product has the high security in the thermostable characteristic,and designs a driving circuit to actuate the cocurrent to have brushes the motor to lead the bicycle advance,comes in the enfilade non-ascent road section use LiFePO4 battery as the actuation electric power to originate,in had the ascent road section use lead-acid battery to come as the actuation electric power to originate, has promoted bicycle's endurance and reduces accumulator cell's energy loss.

本论文中，目的在研制应用於混合式电池於电动自行车之直流马达驱动器设计，使用铅酸电池与磷酸铁锂电池来作为主要驱动动力来源，磷酸铁锂电池具有寿命长、放电功率大及转换功率佳适合高电流产品的特点；铅酸电池为一市面上相当成熟的电池产品具有高度的安全性於耐高温的特性，并设计一驱动电路来驱动直流有刷马达来带动自行车前进，於直路无斜度路段使用磷酸铁锂电池来作为驱动电力来源，於有斜度路段使用铅酸电池来作为驱动电力来源，提升了自行车的续航力和降低蓄电池的能量损耗。

Little amounts of cyanide were found in all parts of plant tissues, indicating the passage of ferrocyanide through the plants.Mass balance studies showed that iron cyanide complex moving into plants from hydroponic solution can be metabolized during transport.

由于没有检测到在气态下的总氰化物，表明植物的蒸腾作用没有将亚铁氰化物释放到大气中；(3)尽管植物吸收到体内的亚铁氰化物足有限的，但物质平衡实验表明其在植物体内迁移的过程中超过96％的郜能被植物有效转化；(4)所用的4种亚铁氰化物浓度在192 h内没有对柳树产生毒性作用。

Mass balance studies showed that iron cyanide complex moving into plants from hydroponic solution can be metabolized during transport. Phytotoxic effects were not found in all treatment groups, even at high doses of ferrocyanide within a 192-h exposure period.

由于没有检测到在气态下的总氰化物，表明植物的蒸腾作用没有将亚铁氰化物释放到大气中；(3)尽管植物吸收到体内的亚铁氰化物是有限的，但物质平衡实验证明其在植物体内迁移的过程中超过96％的都能被植物有效转化；(4)所用的4种亚铁氰化物浓度在192 h内没有对柳树产生毒性作用。

R9 TP heads are similar to the compact shape of the Tour Preferred irons (which are the most popular and successful irons on the PGA Tour today), yet the R9 TPs offer a larger hittable face area due in part to differences in the way the head blends into the hosel.

九号大埔头类似的旅游首选铁杆小巧的外观设计（这是最流行的和成功的铁杆在PGA巡回赛今天），但九号贸易点提供一个更大的hittable部分地区因面对的方式不同到铁杆头混合物。

In addition, the structure of the iron bacterial community was different among the three wastewater stations although the biodiversity of the iron bacteria was similar.

利用4种探针的各种组合对外排水中铁细菌的检测表明，单探针能够很好地分析外排水中铁细菌的群落结构，而组合探针能快速、较准确地检测外排水中铁细菌的数量，比传统的绝迹稀释法具有快速、准确、直观等优点。

Adding every organic matter all could increase the contents of activated iron and chelation iron in soil significantly and the effects of treatments with corn straw and pig manure on the content of activated iron in soil were more prominent. Adding organic matters had no significant effect on the activated aluminum and chelation aluminum, but there was significant difference on the content change of activated aluminum between the treatments with weathering coal and peat and the treatment with pig manure.

各有机物料的加入均使土壤活性铁和络合铁含量显著增高，且玉米秸秆和猪粪处理对土壤活性铁含量的影响更为突出；各有机物料的加入对活性铝和络合铝的影响不显著，但风化煤处理与泥炭和猪粪处理间的活性铝含量变化存在显著差异。

In comprehensive concerning of all above,it is suggested that theincrease of zinc content in shoot apex may involved in IAA synthesis in thispart,which is more likely to be an orignal signal that plays a critical role inthe regulation of root ferric reductase activity of iron-deficientdicotyledonous plants.

综上所述，缺铁胁迫条件下，根系铁含量的降低导致根系锌含量的积累，从而使茎尖的锌含量增加并有可能促进地上部IAA的增加。在双子叶植物中，IAA可能是调节缺铁根系〓还原酶活性的初始信号物质。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。