时效的英文：
prescription

A prescriptive right
因时效而得的权利

We call this rise in strength "age hardening."
这种强度的增加我们称为“时效硬化”。

a prescriptive right
【律】(由于长期使用而获得的)时效权利

But obviously the implied limitation must have its limits, or the contract and due process clauses are gone
但显而易见这种“法律隐含的时效”必须有一定的限制，不然合同及相应的法律程序条款，就没有效力了。

How are prescription drug and blame prescription drug divisional?
处方药与非处方药怎么区分的?

Not in accord with the rules of a prescriptive grammar.
不合语法的不符合规定的语法规则的

The prescription of drugs is a doctor's responsibility.
开药方是医生的职责。

To become invalidated or unenforceable by the process of prescription.
因法定期限完结而丧失权利或不可执行

Take this prescription to the dispensary for your medicine.
把这张药方拿到配药处去配药。