星期四上午所签的合同从3月11日起生效。

The contract that was signed on Thursday morning was backdated to March 11.

《柯林斯英汉双解大词典》

理论上来说，由国际捕鲸委员会声明的《全球禁止捕鲸公约》从1986年就开始生效。

In theory, a global moratorium, proclaimed by the International Whaling Commission (IWC), has been in force since 1986.

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本合同有效期从合同生效之日算起共10年，有效期满后，本合同自动失效。

The contract shall be valid for 10 years from the effective date of the contract, on the expiry of the validity term of contract, the contract shall automatically become null and void.

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We just did some basic breathing techniques and what's called guided imagery where you picture yourself being your true self, from what works in your past, what feels right in your past.

我们只是进行了基本的呼吸技巧训练,和所谓的意向引导,你从过去生效的例子中，从过去感觉对的例子中，描绘出真正的自我。

普林斯顿公开课 - 人性课程节选