Call-backs and running gags are advanced techniques the humor experts use to get laughs. They're a natural when you sharpen your observation skills.

回味和重复是一些幽默行家用来博得大笑的高级技巧，当你的观察技巧提高的时候那些就是自然而然的事了。

youdao

When you learn how to think with your eyes we call that observation and when you learn how to think with your ears we call that hearing.

当你学习如何用眼睛思考的时候我们之为观察，当你学习用耳朵思考的时候我们称之为倾听。

youdao

It all depends what you call experience and observation.

那完全取决于你把什么叫做经验和观察。

youdao

Call it the anodyne observation of the obvious.

FORBES: The Amazing Confusion Over European Shale

IncREO - Increasing Resilience through Earth Observation is a collaborative project under the call FP7-SPACE-2012-1 in support of emergency response management and risk-preparedness.

UNESCO: OFFICE IN VENICE

We condemn all acts of violence, including those targeting pro-regime elements, and we call on all parties to cease acts of hostility -- this is in reference to your observation about the storming of a pro-Assad TV station.

WHITEHOUSE: Press Briefing