They are warmly welcomed in most places, because they are often retired couples who have money to spend, teachers with an entire summer available for travel, or well-behaved families on vacation.

VOA: standard.2010.03.01

Imagine the sort of Heisenberg-esque problems we would get carefully following romantic couples over time and interfering with them to ask questions and make observations.

想想我们将遇到海登堡似的问题,在一段时间内，小心谨慎地跟踪情侣,干扰她们的生活,问问题，作观察。

耶鲁公开课 - 心理学导论课程节选