一旦实现了对行的分类，连接两个表的算法就十分容易：数据库服务器仅仅连续地读取两个已分类表，并合并所有相匹配的行。
Once the rows are sorted, the algorithm for joining the two tables is easy: the database server simply reads both sorted tables sequentially and merge all rows if they are matching.
该净化机器人采用两组行星轮系组合来实现关键的径向直线伸缩运动，并合理配置密封来实现上述需求。
In the robot, two planetary gear mechanisms were assembled to realize the radial rectilinear stretching motion and a seal structure was used.
在激光技术中，常用光束并合的办法来实现高功率、高光束质量的光束以满足实际需要。
At laser technology , in order to obtain the beam of high-power and high-qulity, beam combination is usually used for satisfying applications requirements.
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