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- By examinations of metallograph, microhardness, X-ray diffraction, the author determines the boriding layer's microstructure and hardness curve. 该低温渗硼剂能较好地实现低温渗硼,渗硼层呈梳齿状,致密、疏松孔洞少,硼化物前沿没有明显的过渡区,也无明显的富碳区;
- But Jonathan Livingston Seagull, unashamed, stretching his wings again in that trembling hard curve - slowing, slowing, and stalling once more - was no ordinary bird. 但是乔纳森并不觉得丢脸,他再一次展开双翅,依旧颤抖着使劲弯曲。
- The analyses of the aging hardness curve of the composites showed that the additions of Al-silicate short fibber accelerated aging and there were double hardness peaks on the hardness curve. 对复合材料的时效动力学分析表明：硅酸铝短纤维的加入，使基体时效析出的硬度峰提前；时效动力学曲线上出现双硬度峰现象；
- 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。
- We must take a hard look at our finances. 我们应该密切注意财务问题。
