必须不

He also gained first-hand knowledge of medical procedures by scrubbing in on neonatal and pediatric surgeries, as well as researching pediatric AIDS patients in San Pedro Sula from 1994 to the present.

当然了，必须得到允许才能进入的重症监护室也不逊色。顺便说一下，有一种人实在很不知趣，居然在重症监护室里看喜剧片，而且还哈哈大笑。

Where arailway crosses a navigable water way, and it is impossible to lift theline high enough for vessels to pass underneath without interception, abridge must be built which is capable of being opened in order to allowthe river or canal traffic topass.

在铁路经过通航河道的地方，如果那时不可能做到把线路升高到使船只在下面不受阻碍地通过的话，就必须把桥梁修成开启式的，以便江河或运河里的船只通过。

It is the key core of transportation mobility. Without proper transportability, transportation mobility would be weakened.

为提高军事装备的运输机动性，就必须首先重视其运输性，不易运输的军事装备不能快速机动和部署，其战斗力也不能得到有效发挥。

Shopkeepers can do away with expensive cash floats and elaborate ruses to stop cash fraud—such as charging $4.99 so that the $5 bill most people hand over has to pass through the till for one cent change rather than being trousered by a shop assistant.

店主不在有处理大额现金的烦恼，亦不用再绞尽脑汁去想如何制止那些现金诈骗了——比如说给一个商品定价4.99美元，而大多数人都会递出一张五美元，这样这张五美元就必须经过以获得一美分找零，而不会被售货员收入囊中。

Shopkeepers can do away with expensive cash floats and elaborate ruses to stop cash fraud—such as charging $4.99 so that the $5 bill most people hand over has to pass through the till for one cent change rather than being trousered by a shop assistant.

店主不在有处理大额现金的烦恼，亦不用再绞尽脑汁去想如何制止那些现金诈骗了——比如说给一个商品定价4.99美元，而大多数人都会递出一张五美元，这样这张五美元就必须经过储币抽屉以获得一美分找零，而不会被售货员收入囊中。

This paper describes and interprets employment situations of vague language in English business correspondence,thus concludes that the employment of vague language in English business correspondence is still based on the principles of clarity and appropriateness for business letters.The paper divides the employment situations into two kinds: objective unability and subjective unwillingness,based on wh...

通过对英文商务信函中模糊语言的使用情境进行描述性和解释性分析，认为模糊语言在英文商务信函中的使用还是基于商务信函必须明确得体这一原则，得出模糊语言在英文商务信函中的使用情境分为客观上的不能和主观上的不愿，在此基础上将模糊语言分为内容上的和语气上的两种类型，并从关联理论的角度对这两种情境存在的合理性进行解释。

But every coin has two sides. As now the management of network still lacks rules, it gives out lots of negative and unadvanced informations, especially some unhealthy culture. All these problems should be paid attention to when constructing and completing network in the future.

但是任何一个事物都有其两面性，计算机网络也是一样，由于目前网络的管理还存在着很大的不规范性，网络信息形成了很多消极、落后的东西，尤其网络中的一些不健康文化，这都是今后网络建设和完善过程中必须注意的问题。

After researching some establishments of Membership Function, this paper suggest establish Membership Function by Statistics. Because Membership Functions in different industry are unalike, and they also influence by macroeconomic, so the establishment of Membership Functions must depend on the industry development.

本文认为不同行业、不同指标的隶属度函数是不一样的，而且会受宏观经济的影响，要确定受评价创业项目的隶属度函数，必须依赖于当前该项目所处行业的总体情况，因此，传统的确定隶属函数方法如Zadeh公式不能很好的反应现实情况。

Article 15 The facilities, tools, pipes and containers used for the production of food additives shall satisfy the corresponding hygienic requirements and be made of innocuous, unattacked, watertight and non-deforming materials without any abnormal smell.

第十五条食品添加剂的生产用设备、工具、管道、容器必须专用并符合相应的卫生要求，采用无毒的、无异味的、耐腐蚀的、不渗水的、不变形的材料制作。

Article 7 State organs, enterprises, public institutions, other organizations, individual industrial and commercial households, individuals and other statistical investigation objects must abide by this Law and the relevant state provisions and authentically, accurately, completely and timely provide the data needed by statistical investigation, and may not provide any unauthentic or incomplete statistical data or delay or refuse the report of statistical data.

第七条 国家机关、企业事业单位和其他组织以及个体工商户和个人等统计调查对象，必须依照本法和国家有关规定，真实、准确、完整、及时地提供统计调查所需的资料，不得提供不真实或者不完整的统计资料，不得迟报、拒报统计资料。

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。