由于

Because of the urgent needs felt by the practice and reform of science education as well as the contemporary developments of history, philosophy, and sociology of science and cognitive psychology, science education as a new discipline has gained momentum in its development in terms of infrastructure and theory-building and thus become a burgeoning field of study in educational sciences since the advent of the 1980s.

由于科学教育实践和改革的需要，也由于当代科学哲学、科学史、科学社会学和认知心理学等相关学科的发展，80年代以来科学教育学这门跨学科的新学科在制度和理论层面上都获得了空前的发展，在国际上已成为教育科学中一门显学。

Some oil fields have a mat of heavy tar at the oil water contact. This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibiting water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

Some oil fields have amat of heavy tar at the oil water contact.This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibiting water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

Some oil fields have a mat of heavy tar at the oil water contact. This mat is produced by the degradation of oil as bottom waters move beneath the oil-water contact.Tar mats cause considerable production problems by inhibit ing water from displacing oil.

由于油水界面下面底水的流动造成了原油的降减作用，一些油田的油水界面处常形成一种重油垫，由于重油垫阻止了水对油的替换作用，因而造成了许多严重的生产问题。

In the fuel system in the pipeline is full of fuel as a result of oxidation produced by microglia, as a result of the physical phenomena of the atmosphere, rain, car washing, etc. will inevitably enter the water tank, in the circuit.

在燃油系统的管路中充斥着由于燃油氧化产生的胶质，由于大气的物理现象，下雨，洗车等不可避免的会使水分进入油箱、油路中。

Fourth, to avoid breaking material: Screw must not be allowed in the case of blanking operation, upon occurrence of the stator as dry friction of rubber, produces instant heat and burn, so good grinder, screw grille flow is a necessary condition for normal operation To this end, some screw pump body is also expected to stop off device installed, when there Fracture, because he has a self-priming screw pump function of the characteristics Chemical pumps of the body will produce a vacuum chamber, vacuum screw pump will stop operation.

四、避免断料：螺杆泵决不允许在断料的情形下运转，一经消防泵发生，橡胶定子由于干摩擦，瞬间产生高温而烧坏，所以，粉碎机完好，格栅畅通是螺杆泵正常运转的必要条件之一，为此，有些螺杆泵还在泵身上安装了断料停机装置，当发生断料时，由于螺杆泵其有自吸功能的特性，腔体内会产生真空，真空装置会使螺杆泵停止运转。

Screw must not be allowed to break at the expected operating circumstances, once happened, rubber stator do because of friction heat generated instantly burned, so, good grinder, screw grille flow are a necessary condition for the normal operation of one of For this reason, some screw pump was also installed devices break down material, when the expected happened when broken, because of the screw pump has self-priming function of its characteristics, the body will produce a vacuum chamber, vacuum devices will stop screw operation.

螺杆泵决不允许在断料的情形下运转，一经发生，橡胶定子由于干磨擦，瞬间产生高温而烧坏，所以，粉碎机完好，格栅畅通是螺杆泵正常运转的必要条件之一，为此，有些螺杆泵还在泵身上安装了断料停机装置，当发生断料时，由于螺杆泵其有自吸功能的特性，腔体内会产生真空，真空装置会使螺杆泵停止运转。

Screw does not allow for the case of run-off materials, once occurred, rubber stator due to dry friction, the heat generated instantly burned, so grinder intact, grille flow is a necessary condition for the normal operation of pumps, one of To this end, some screw pump is also installed in the body break down plant material, as occurs when the material off, because he has a self-priming pumps feature the characteristics of the body will produce a vacuum chamber, vacuum devices will screw pump to stop operation.

螺杆泵决不允许在断料的情形下运转，一经发生，橡胶定子由于干磨擦，瞬间产生高温而烧坏，所以，粉碎机完好，格栅畅通是螺杆泵正常运转的必要条件之一，为此，有些螺杆泵还在泵身上安装了断料停机装置，当发生断料时，由于螺杆泵其有自吸功能的特性，腔体内会产生真空，真空装置会使螺杆泵停止运转。

The super mart, as a new type of business mode in China, is accepted by the city customers for its full variety of daily consumables, that the consumers can complete the buying list in one stop. In east area of China, the super marts are replacing the department stores, and becoming the main retailing trading mode. For the prospect of super mart and the potential consumables market in China, the investment both domestic and abroad is involving in this section, such as Wal Mart, Carriford. Since the end of 2004 when China government has execute the promise to cancel limits to foreign direct investment, the development of super mart has entering new stage, where the competition is extending into more developed area of medium cities and towns of counties.

大型超市作为一种新型的零售业态，由于能够提供种类齐全的日常生活用品，满足顾客&一次购齐&的消费需求，因而得到城市居民的广泛认可，在经济较发达的东部地区发展迅速，正逐步取代百货商店成为零售行业的主力业态，由于大型超市良好的发展前景，以及中国作为最大消费品市场的强大诱惑，中外各种资本纷纷涉足这一行业，既有世界级零售企业如美国的沃尔玛、法国的家乐福等，也有其他行业的资本，特别是中国在2004年底根据入世承诺基本取消对外资进入国内零售行业的各种限制后，大型超市行业进入了全新的发展阶段，竞争空间正在向经济较发达的地市级和发达县市级城市延伸。

The front door of the hollow tree faced eastwards, so Toad was called at an early hour; partly by the bright sunlight streaming in on him, partly by the exceeding coldness of his toes, which made him dream that he was at Home in bed in his own handsome room with the Tudor window, on a cold winter's night, and his bedclothes had got up, grumbling and protesting they couldn't stand the cold any longer, and had run downstairs to the kitchen fire to warm themselves; and he had followed, on bare feet, along miles and miles of icy stone-paved passages, arguing and beseeching them to be reasonable.

树洞的大门朝东，因此蟾蜍一早就醒了，部分是由于明亮的阳光射进来，照在他身上，部分是由于他的脚趾尖冻得生疼，使他梦见自己睡在他那间带都铎式窗子的漂亮房间的床上。他梦见那是一个寒冷的冬夜，他的被子全都爬了起来，一个劲儿抱怨说受不了这寒冷，全都跑下楼到厨房烤火去了。他也光着脚跟在后面，跑过好几哩长冰凉的石铺道路，一路跟被子争论，请它们讲点道理。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。