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This paper analyses the main problems of welding torch used in automatic CO2 welding and the reasons of these problems.

分析了手工空冷式CO2焊枪用于自动堆焊时存在的主要问题，设计出一种用空气冷却的、适于大电流堆焊的焊枪。

O, ? it is particularly well-suited for displaying program code.

o， ？的字形，它是特别适于显示程序代码。

The purpose of our study is to regulate the lignin biosynthesis of Chinese white poplar on molecular level by antisense RNA technology to breed the resource tree species more suitable for paper making in China.

本研究旨在通过反义RNA技术，对木质素的生物合成进行分子水平上的调控，以降低造纸资源植物的木质素含量或改变组分，培育更适于造纸工业用的原料树种。

Wingless insect with ''.'mouth'.

无翅膀的昆虫，嘴适于''。

All the woodpecker s have scansorial feet.

所有的啄木鸟都有适于攀爬的脚。

This form is suitable for the supply of materials to achieve zero inventory.

适于这种供应形式实现零库存的物资。

To a large extent,man's fate inpsychology is due to the latter's dichotomous viewpoint that fits with studying man as abiological specics.

人在心理学中的这一命运，在很大程度上归因于心理学至今仍以适于物种研究的二歧视野研究人，仍未真正确立心理学的整合视野。

Four testing methods to detect the pollen viability of cucumber were being compared. The results indicated that I-KI staining method and acetic red dyeing were not suitable to judge the pollen viability of cucumber. Tetrazolium method can be used but the error is oversize. By and large, the Germination in vitro method was an efficient, stable and simple way to judge the pollen viability of cucumber. The component of culture medium is 10% sucrose+ 100mg/L H_3BO_3. If inoculated intraday, collect pollen of fresh abloom flower at 6:00 and if inoculated at the second day, collect before dark.

比较了4种常用的花粉活力测定方法——I-KI染色法、醋酸洋红染色法、TTC染色法和离体萌发法，认为I-KI染色法和醋酸洋红染色法不适于测定黄瓜花粉生活力，TTC染色法虽适用但误差较大，综合考虑各项因素，确定离体萌发法是最准确、简便、稳定的测定黄瓜花粉活力的方法。

In this paper, the synthesis ways and applications of 4,5-dimethyl-l,3-dioxolen -2-one were introduced. An appropriate way synthesizing DMDO from acetoin via acylation, cyclization and dehydrochlorination was selected. The influences of various process conditions on the reaction were studied in detail, and the optimum process conditions were obtained by single factor experiments.

本文介绍了医药中间体4，5-二甲基-1，3-二氧杂环戊烯-2-酮的应用情况和合成路线，选择了适于工业化生产的工艺路线，即采用羟基丁酮为原料，经酰化、环合和脱氯化氢等步骤合成DMDO，并采用单因素试验法详细研究了各项工艺条件对反应结果的影响规律，确定了优化工艺条件。

The one of extreme bitterness of words especially if they be aculeate and proper; for ill words applicable to all and sundry are nothing so much; and again that in anger a man reveals no secrets; for that makes him not fit for society.

其一、语言的极端辛辣，尤其是当语言需要中肯合适之时；因为适用各种情况的笼统语言，虽然是坏话，也算不了什么；再说一次，愤怒中绝不要揭露隐私，因为这样会使对方不适于社交。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！