不可缺少的

The connotation of sustainable tourism which sparkpluged by《The Agendum of Tourism in 21 Century》, promulgated by the WTO and WTTC,indicates clearly that community participation is a very important and indispensable content of tourism development.

1997年世界旅游组织、世界旅游理事会与地球理事会联合制定并颁发的《关于旅游业的21世纪议程》所倡导的旅游业可持续发展明确提出把居民参与当作旅游发展过程中的一项重要内容和不可缺少的环节。

It is shown that the exogenous hormones are not necessary to initiate the androgenesis,but they can promote further growth of pollen embryoids and calluses.

外源激素对于雄核发育的启动不是必需的，但对愈伤组织进一步的生长却是不可缺少的。

A new method is proposed to develop a test system about a kind of automatic pilot. With the help of Real-Time Windows Target Toolbox in MATLAB. operating on PC cards is very simple.

0引言 MATLAB具有很强的矩阵运算、信号分析、可视化图形显示等功能，并且越来越多的工具箱使它的功能日趋强大，并逐渐成为系统仿真、项目开发不可缺少的软件工具。

This enlightenment movement is worth researching because of its important influence on the evolvement history of modern Taiwan society,and in the movement,Yin-haiguang,as a bannerman ,is especially worth paying attention to.

要早日实现祖国统一，政治方面的努力当然是至关重要的，同时学术方面也需要加强交流，这是深度了解对方、认识对方历史情境的不可缺少的一环。

Evaluation is a basal part of integrated study and an approach to promote the development of Chinese education.

评价是综合性学习活动的基本环节，也是保证语文教育沿着正确的方向发展的不可缺少的重要手段。

It is well known that metal ions play important roles in the catalysis of a large number of different enzymes.

金属离子是许多不同酶分子中不可缺少的重要组成部分，并在酶的结构和功能中发挥着重要的作用，特别是含锌离子的酶，由于遍布于六大类酶中的每一类而更加引人注目。

I'll speak to him to hear his intentions and then comport myself as a consequence.

在罗马的Parco dei Principi Hotel酒店，这名42岁的教练在他的职务陈述上提到：对于每个人来说托蒂都是那种不可缺少的球员。

Therefore, switching power supply to small, lightweight and highly efficient characteristics are widely used in electronic computer-driven variety of terminal equipment, communications equipment, and so almost all the electronic equipment, is the rapid development of electronic information industry indispensable to a Power approach.

因此，开关电源以小型、轻量和高效率的特点被广泛应用于以电子计算机为主导的各种终端设备、通信设备等几乎所有的电子设备，是当今电子信息产业飞速发展不可缺少的一种电源方式。

Our honest and sureness working attitude will be the good assist, which is necessary for your success.Because your ease is our disburden.

我们诚信、踏实的工作作风将成为您的业务成功不可缺少的好助手，因为您的安心，就是我们友信人的放心！

The maximum water content is 39.51%. It is indispensable or even the unique water source for natural forest and manual vegetation live through the winter,vegetation growth in spring,water metabolism,and also is a centra factor of ecological balance.

冻结滞水比冻结前水量一般增加8%～25%，最高增加39.51%，是天然和人工植物越冬、春季繁衍的水分代谢均衡不可缺少的，甚至是唯一水资源，是保持生态平衡的主导因子。

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。