不可缺少的

A method using the comparison of the temperature of the cryogenic vessel outer surface with the drew\|point temperature of the air to judge the effectiveness of the cryogenic vessel vacuum is proposed.

引 言当前，低温技术的应用和发展已经迅速地渗透到各个科学领域，成为尖端科学和国民经济建设的一项不可缺少的技术[1]。

As mankind's communication tool and information carrier, language, like the air we breathe, is something which the society and its members cannot do without, not even for a short period of time.

语言作为人类交际的工具和信息的载体，对社会，对社会全体成员来说，简直跟空气一样，是须臾不可缺少的。

There is a relationship between the steel bar Leeb hardness and its tensile strength.

在新房的质量鉴定和旧房的改造过程中，钢筋抗拉强度是不可缺少的判定依据。

Self-checking is an indispensable function in modern signal recording equipments for radar application. So, doing research on high-speed pulse generator becomes more and more important.

高速数据采集系统的机内自检与测试是系统设计中不可缺少的一项功能，高速脉冲信号源是采集系统自检与测试系统的重要组成部分。

Students' files are the indespensable parts in the educational organization which are essential to the decision-maker and supervisor in a school.

学生档案是一个教育单位不可缺少的部分，它的内容对于学校的决策者和管理者来说都至关重要。

The examination place row of place system is an education unit essential part, its content regarding the school policy-maker and the superintendent all very important.

考场排座系统是一个教育单位不可缺少的部分，它的内容对于学校的决策者和管理者来说都至关重要。

Square's dancing in people's cultural life has already occupied an indispensable contents, is developing spiritual civilization construction, the station contains important position in the civil workout activity.

广场舞在人们的文化生活中已占有不可缺少的内容，在开展精神文明建设，全民健身活动中站有重要的地位。

Consequently, as the new century the number of kindergartens, own a management system is indispensable.

于是，作为新世纪数字化的幼儿园，拥有一个属于自己的管理系统更是不可缺少的。

Advantageous physical and chemical characteristics, the highly purified and ultra-fine fused spherical quartz powders (spherical silica powder—SSP) become indispensable for packing and sealing materials in LSI and SLSI. The actuality of research and development of SSP in China is studied and the international situation of production is also introduced briefly.

高纯超细熔融球形石英粉由于具有高纯度、高耐热、高耐湿性、高可靠性、高填充量、低粘度、低放射性、低应力、低膨胀、低摩擦系数等优越的物理化学性能，在大规模、超大规模集成电路的基板和封装料中，成了不可缺少的优质材料。

Profession essential part,Its content said regarding enterprise s superintendents and thetechnical worker all very important,Therefore...

汽车修理管理系统是一个汽车修理行业不可缺少的部分，它的内容对于企业的管理者和技术工人来说都至关重要，所以。。。

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。