1·When nutrients are used over and over in the environment, we call that a nutrient cycle.
当营养物质在环境中被反复使用时，我们称之为营养循环。
2·This improves performance chiefly because the database saves all the overhead involved with calculating the execution plan for the same query over and over.
这将极大地提高性能，因为数据库节约了对相同的查询反复计算执行计划所需的所有开销。
3·When the program executes, the same transaction with random parameters is executed over and over in each of the 10 connections.
当程序执行时，将在10次连接的每一次中用随机参数反复执行相同的事务。
4·The raw materials are struck over and over until they become loose. Then they are mixed with water.
这些原材料经过反复捶捣直至其结构松散(即造纸过程中的帚化)，然后与水混合。
5·Practice, over and over, until you are able to do your presentation with the minimal amount of cue CARDS.
练习吧，反复操练，直到你只借助最小数量的提示卡就能做好汇报。