balance between pastures and livestock

例句：

1. 1. Theteacher asked the students to balance their bookson their desks.
   老师要求学生们把书放在桌子上保持平衡。
2. 2. Theteam needs to find abalance between work and rest.
   团队需要找到工作和休息之间的平衡。
3. 3.The economy is in a delicate balance ofsupply and demand.
   经济处于供需之间的微妙平衡中。