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In order to utilize lignin effectively, base on the situation in China, the study was carried on systematically, centering around the topic of two step sulfomethylation of the soda lignin of wheat straw (the first step is methylolation, the second is sulfonation) and its application. The main purpose is to develop a heterogeneous catalytic system which not only catalyzes but also homogenizes the lignin molecule in the reaction.

为真正高效利用碱木素，木论文根据我国实情，紧紧围绕着麦草碱木素两步磺甲基化（第一步为羟甲基化，第二步为磺化）及其应用这一主题，以开发出在反应过程中既可催化反应又能使木素分子均一化的多相催化体系为主要目标，系统地展开了研究。

With the high-speed development of computer network and itsextension of open, sharing and interlinking, Internet becomes the mostprimary tool of informati on interchanging step by step.

随着计算机网络的发展和网络的开放性、共享性及互连程度的扩大，因特网日益成为信息交换的主要手段，同时这也给网络的安全性带来了严峻的挑战。

The next step will be to increase renminbi liquidity regionally, and in the end a step toward internationalizing the renminbi.

下一步将区域性的增加人民币的流通性，最后达到人民币的国际化。

With the development of economy and society, the country intervened in social economic life step by step.

随着经济和社会的不断发展，国家对市民社会经济生活进行了越来越多的干预。

We all need a step stool or a step ladders, for example, to get something from a height.

我们都需要一步一步凳子或梯子，例如，要获得的东西从高处。

The results indicated that the lysing curve of host cells was consistent with the one step growth curve of cyanophage, thus it was more convenient to substitute measuring the lysing curve of host cells for the one step growth curve measurement of cyanophage.

近年来，随着浮游病毒的认识的深入，人们认识到浮游病毒对水体中初级生产力的影响是巨大的[1] ，其主要证据就是发现噬藻体在海洋蓝藻的种群控制上发挥着重要作用[2 ] 。

By studying and learning the overseas experiences, the bus rapid transit with the Chinese characteristics should be established and meliorated step by step with our urban traffic specific conditions to improve the running efficiency and the whole level of service of the public traffic, and then make the entire traffic environments better in essence.

借鉴国外成功经验，结合我国城市交通具体情况，建立并逐步完善有中国特色的快速公交系统，以期提高公交运营速度与整体服务水平，进而从根本上改善整个交通环境。

The method of miniaturing dielectric coaxial resonators was described. The structer of step-impedance can effectively reduce the length of a dielectric coaxial resonator, each length of a step-impedance coaxial resonator is usually calculated by solving resonatant condition equation, which is complicated.

阶梯阻抗结构可以有效地降低同轴谐振器的高度，阶梯阻抗同轴谐振器的各段长度一般是通过求解谐振条件方程式来确定，计算过程整琐。

The common people should stick to the lowest moral requires, first and then pursue high-level moralities step by step.

总之，道德是政府和市场之外的一种重要力量。

Of like Dante, to introduce to the reader, step by step in depth, a layer of more unbearable than a layer of more terror, but a layer of a layer of more than ...

作者就像但丁，把读者引进去，步步深入，一层比一层更不堪更恐怖，但一层比一层更。。。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。