The agreement will take effect once twenty-five countries have ratified it into law after signing it.

VOA: special.2009.12.08

The Pygmalion effect that we are going to talk about next week or the week after, shows how teachers' expectations are self-fulfilling prophecies.

我们下周或再下周会探讨,皮格马利翁效应，说明为什么教师的期望就是自我实现的预言。

哈佛公开课 - 幸福课课程节选

Three years from now, that is after the next president has had time to enact this program and the program has had some time to begin taking effect will the number of illegal immigrants in the United States be higher, lower or about the same? Ken Judd.

年后，这期间，下届总统有可能制定相关法案,而该法案刚好也已经生效,美国境内的非法移民,是增多，减少还是持平？，肯·贾德你先来。

斯坦福公开课 - 经济学课程节选