1. If not 0 then the key field is made the primary key in the database table. If 0 then the key field is set as primary key. 一个标志。如果不是0，则将关键字字段作为数据库表中的主关键字。如果不是0，则将关键字字段设置为主关键字。
2. Its equipped with the keys have a cross key, the general key word, key word computer, intelligence and other key species. 其配备的锁匙有十字匙、一字普通匙、一字电脑匙、智慧匙等品种。
3. To fix this conflict, you may change the foreign key to match an existing primary key, reinsert the original primary key value, or ignore the conflict. 若要修复此冲突，可以将外部关键字更改为与已有主关键字相匹配的值，重新插入原始主关键字值，或忽略此冲突。
4. key or 6 key square serration axle is the traditional structure of starter armature shaft for auto and tractor and has been replaced by cold rolling multi key involuting serration axle. 铣削加工的四键或六键矩形花键是汽车、拖拉机用起动机电枢轴上的传统结构，已逐渐被用冷滚轧加工的多键渐开线螺旋花键所代替。
5. To the right , use right key , and to the left, use left key . to swing the racket, center press or use key 5. 右边，使用权的关键所在，左，使用左键。挥球拍，或使用按中心键5。
