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- Annex XI of AWS D1.1-96 provides guidelines for alternative methods of determining proper amounts of preheat: the HAZ hardness control method, or the hydrogen control method. 附件十一的自动气象站d1.;1 - 96提供了指导方针替代方法确定适当数额的预热：哈兹硬度控制方法，或氢的控制方法。
- HARD CONTROL: The UV filters present in Hard Control protect the hair from the sunrays and from environmental pollution, preserving the hairstyle from humidity. 强力发胶：含有抗紫外线抗污染成分，并且使头发保湿定型；
- The HAZ hardness control method, which is restricted to fillet welds, is based on the assumption that cracking will not occur if the hardness of the HAZ is kept below some critical value. 热影响区硬度控制方法，即只限于角焊缝，是基于一个假设，即打击不会再发生，如果硬度的哈兹是低于一些关键的价值。
- Those rebellious teenagers are hard to control. 那些反叛的青少年很难管教。
- 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。
- 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。
- 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。
- 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。
- 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。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- 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。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- She was trying hard to disgorge a fish bone. 她拚命想把鱼刺吐出来。
- The emery is a hard metallic substance. 金刚砂是非常坚硬的金属物质。
- Hard training will fit them to run long distances. 严格的训练将使他们能跑长距离。
- Seth really took it hard when his old dog died. 塞思的那条老狗死的时候，他确实怏怏不乐。
- Heavy taxes indispose a citizen to work hard. 重税于国民不愿意辛勤工作。
- It was hard work getting the children off to bed. 哄孩子们去睡可不是容易的事。
