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- The characteristic of knoop hardness test method for metallic materials are introduced. 文章介绍了布氏硬度试验中测量结果的不确定度评定方法。
- It' s hard finding time to study ( the subject ). 很难找出时间来学习（这门学问）.
- It' s hard to define exactly what has changed. 很难解释清楚到底发生了什麽变化.
- IT'S hard to fininsh this task in less than a week. 要在不到一周的时间内完成这项工作，是件困难的事情。
- This is a hard test in which the class all make low scores. 这是一次较难的测试,班上所有的学生都得了较低的分数。
- It’s hard to say go out there and play a game offensively. 很难说让他们上场去打出一场美妙的进攻。
- No abnormity was found in the metallographi cal analysis and hardness test. 金相和硬度分析未发现明显异常组织和硬度分布。
- Scratch Hardness Test Using a Diamond Stylus on the Micro-Tribometer mod. 便条硬度试验用钻石笔在微摩擦国防部。
- It' s hard to readjust ( oneself ) to life in Britain after working abroad. 在国外工作之後; 很难重新适应英国的生活.
- We passed the GESE band 4 and we will welcome the new and hard test. 我通过了绿色通道英语口语4级的考试，我们还要迎接新的难的考试。
- Teacher Judy Garber says it”s hard to get the kids away from the computers. 加利福尼亚圣卡洛斯的阿让代尔小学可以说是美国最先进的在线学校。
- Eath time a new axis of tavel is used, the robot’s hard stops must be changed. 每当要用到一个新的行程路径时，自动装置必须改变硬机械。
- Method of measurement uncertainty evaluation for Brinell hardness test results was introduced in the present work. 文章介绍了布氏硬度试验中测量结果的不确定度评定方法。
- The twi are so much alike that it‘s hard to distinguish between them. 两个又胞胎如此相似，以至于很难区分他们。
- With the hectic pace of life these days, it’s hard to find a moment of peace. 现代生活繁忙的节奏中，要找到一个平和的时刻也是很困难的。
- Use this utility to copy DOS and NetWare drivers to your computer’s hard disk. 第二章讲述8098单片机的基本结构，包括硬件和软件的组成；第三章讲述中央处理器的基本概念；
- The results of the hardness test prove the effect ot secondary hardening in cau- sed by forming M_(23)C_6 carbides. 高温硬度试验证明二次硬化效果是由 M_(23)C_6碳化物形成引起的。
- The characteristics of so-called silicon diffusion layer were analyzed through EPMA and hardness test. 通过成分分析（EPMA）和硬度测试， 分析了硅扩散层的特征。
- The aging process of mullite short fibre reinforced ZL109 composites was studied via hardness test. 通过测试硬度的方法，对莫来石短纤维增强ZL109复合材料的时效析出行为进行了研究。
- The advantage of hardness test is fast, inexpensive and relatively nondestructive, leaving only a small indentation in the material. 硬度测试的优点是快，便宜，并且比较不具破坏性，只在材料上留下小小的压痕。
