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- This paper advanced a study method that can observe plastic deformation behavior of surface layer of die cavity by showing austenite grain, size, crack morphology and propagation mode. 提出了通过显示奥氏体实际晶粒度、裂纹形貌和扩展方式来分析热锻模具型腔表层塑性变形行为的试验方法。
- The crack morphology of hardfacing metal was investigated by means of optical and scanning electron microscopy.The effect of RE oxide on cracking resistance of hardfacing metal was studied. 采用金相和电镜等手段对堆焊裂纹形貌进行了观察，并研究了稀土氧化物对堆焊金属抗开裂性能及塑、韧性的影响。
- A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
- The marchers jumped off at the crack of dawn. 行军队伍在破晓时出发了。
- The riot police started to crack down on them. 防暴警察开始对他们采取镇压行动。
- You'll crack up if you go on working so hard. 你继续这样拚命干下去，身体会吃不消的。
- Have another crack at solving this puzzle. 再试一试把这个难题解决了吧。
- She made a crack about his fatness. 她取笑他肥胖。
- There is a crack in this window. 这扇窗户上有个裂纹。
- She got up at the crack of dawn. 天刚亮她便起床了。
- Mary found knitting a hard nut to crack. 玛丽发现编织并非易事。
- He was the tough guy, the big shot, who gave orders with the crack of a whip. 他是个威风凛凛发号施令的强悍的家伙，是个大人物。
- I'd do anything to see you crack a smile. 为了博得你的一笑，我情愿做任何事。
- Her foot wedged in the narrow crack. 她的脚卡在那狭缝里了。
- Close examination revealed a crack in the vase. 花瓶经仔细检查发现有裂缝。
- It was then a hard nut to crack. 在那时是一桩很棘手的事。
- It was then a tough nut to crack. 在那时是一桩很棘手的事。
- Painting the ceiling was a tough nut to crack. 油漆天花板是件难事。
- If you do not rest you'll soon crack up. 要是你不休息,很快会垮下来的。
- This is my first crack at cooking. 这是我第一次尝试做饭菜。
