Tillage location test and its cooperativetest in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.
在小麦、玉米一年两熟制农田上，进行耕法定位及配合试验，试验表明，耙茬少耕的有效年限为1 ~ 2年。
2
Few environments test the ability of team members to balance competitive and cooperative instincts as well as the Oxford and Cambridge Boat Race does.
几乎没有一个环境测试可以得到团队成员的平衡竞争与合作的能力，牛津大学和剑桥大学划船赛亦是。
3
Group-to-individual transfer occurs when individuals who learned within a cooperative group demonstrate mastery on a subsequent test taken individually.