您要查找的是不是：
- Trace hard ness indicator 微量硬度指示剂
- Complete this one step, virus deletes his original document, let an user discover its trace hard. 完成这一步骤,病毒就删除自己的原始文件,让用户难以发现它的痕迹。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- It is hard to trace the order of discovery. 很难查出谁是最先发现的人。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- I can't trace that letter you sent me. 我找不到你寄给我的那封信。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- He spoke without a trace of emotion. 他说话时毫不动感情。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- Did the police find any trace of the murderer? 警方找到凶手的行踪了吗？
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- They failed to find any trace of the runaways. 他们未能找到逃跑者的任何踪迹。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- There was barely a trace of salt in the soup. 汤里简直一点盐也没有放。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- The post office tried to trace the lost letter. 邮局设法查出那封丢失的信。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- The kids are learning to trace the letter. 孩子们学描字母。
