您要查找的是不是：
- The goal of the study of multidatabase systems in to solve the issue of sharing all the information in these pre existing databases by preserving the investment in the building of these databases. 互联网络上的多数据库系统由联结在网络上的先期存在的多个高度自治的异构数据库组成。
- pre - existing crack 预制裂纹
- 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。
- A hive cannot exist without a queen. 蜂房不可无蜂王。
- 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。
- They seem to exist on a different spiritual plane. 他们似乎生活在不同的精神境界。
- 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。
- We can not exist without food or water. 没有食物和水我们不能生存。
- This paper analyzes the situation of cracks in concrete of shiplock's chamber wall, summarizes relevant preventive measures, and proposes treatment schemes for the existed cracks. 摘要分析船闸工程闸室侧墙混凝土裂缝的状况，总结预防此类裂缝发生的措施，对裂缝提出处理方案。
- Our future plans must mesh with existing practices. 我们未来的计划必须与当前的实践相合。
- Matter can exist as a solid, liquid, or gas. 物体存在的形态有固体，液体，气体。
- 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。
