四级的

Later, as the interaction of origin, transit, center, sales, Si- chuan bristles firms and the development of the industry underwent through four periods of foreign monopoly, Huayang competition, the government dirigisme, and free trade.

四川猪鬃产业发展开始于19世纪末期。1891年，英商立德乐入川创办第一家猪鬃加工厂，此后，随着产地、转运、中心、销售四级市场的互动，四川猪鬃业的发展先后经历了洋行垄断、华洋竞争、政府统制、自由贸易四个时期。

Any model of the quarternary structure of RubisCO should have the small subunit placed in a protected position among the large subunits with only limited area exposed to the outer surface of the holoenzyme.

任何RubisCO的四级结构模型都应将小亚基置于大亚基中间受保护的位置，一部份小亚基可暴露于全酶分子表面。

Cycles were recognized in the field and Fischer plots were used to analyse the cyclic sequence. 3 third_order and 12 fourth_order sea level curves were differentiated. The 84 cycles are considered to be of a kind of Milankovitch rhythms formed by the eccentric variation of the earth.

在野外共划分出了84个旋回层，用Fischer图解对马家沟组的旋回层序进行了分析，共划分出3个三级旋回，12个四级旋回。84个旋回层可能是因地球偏心率变化而引起的米兰柯维奇旋回。

Cycles were recognized in the field and Fischer plots were used to analyse the cyclics equence. 3 third-order and 12 fourth_order sea level curves were differentiated. The 84 cycles are considered to be of a kind of Milankovitch rhythms formed by the eccentric variation of the earth.

在野外共划分出了84个旋回层，用Fischer图解对马家沟组的旋回层序进行了分析，共划分出3个三级旋回，12个四级旋回。84个旋回层可能是因地球偏心率变化而引起的米兰柯维奇旋回。

Level 4 - Teleports a short distance, allowing you to move in and out of combat.

四级 -短距离瞬间移动的能力让英雄在战场出入自如。5秒的冷却时间。

Level 4 - Teleports the target hero to an Asal Prison. The hero remains separated from the real world for 4 second.

四级 -将一个英雄以星体封印，目标英雄在接下的时间内完全脱离和现实世界的联系，持续4秒。

Level 4 - Teleports the target hero to an Astral Prison. The hero remains separated from the real world for 4 second.

四级 -将一个英雄以星体封印，目标英雄在接下的时间内完全脱离和现实世界的联系，持续4秒。

Although many researchers have studied the synthesis of allyl phenyl ether by phase-transfer catalysis, no studies have used it in membrane reactor up to now. The purpose of this paper is to combine the studies of membrane reactor and phase-transfer catalysis. The membrane was used to stabilize the aqueous/organic interface at a fixed position, also the quaternary ammonium ion in the membrane was used as the catalyst to partake in the reaction system directly, and so it can also separate the product and reactants at the same time. A theoretical model is also presented.

中文摘要对於利用相间转移触媒催化技术来合成丙烯基苯基醚的反应，已有不少专家学者研究过，而至今还无在薄膜反应器中进行此反应之研究，本研究则是要结合薄膜反应器与相间转移触媒两者之特性，固定水油两相之界面，并且利用薄膜上的四级铵离子为触媒，直接在反应系统中参与反应，并同时分离产物及反应物，进而推导出相关之理论模型。

The stone-throwing demonstrators are believed to be supporters of Northern Alliance warlord Abdul Rashid Dostam.

据信，那些投掷石块的示威者是北方联盟军阀杜斯塔姆的支持者。68英语网提示：英语四级，六级考试时间

My class' schedule changed and the class in the noontime is more than before, i don't like going to school at the noontime because my classroom is very hot, just like a steam box, that's why they left this classroom for our fresh man.

不想报三级也报了，不然考不了四级，烂学校就是烂学校，从前只认为只要自己好好学，在哪里都可以做得很好，但不得不承认师资力量的好坏还是能带来不同程度的帮助。

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。