strata n. 地层，(组织的)层，社会阶层
reconciliation n. 和解，调和；一致；勉强接受
He was taken up with the reconciliation of husband and wife.
他忙于做夫妻间的调解工作。
prorata n. 按比例分配，摊派
complement n. 补充，互为补充的东西
Rice makes an excellent complement to a curry dish.
有咖喱的菜配米饭最棒。
需要的或允许的数额
We've taken on our full complement of new trainees.
我们招收的新学员已经满额了。
vt. 补足, 补充
The two suggestions complement each other.
这两条建议相互补充