Why isn't this experiment working?

其他的复杂的系统，例如？

麻省理工公开课 - 计算机科学及编程导论课程节选

If this particular genre of music isn't working at this point in time, you can switch it up, and you can vibe off the people.

NPR: Hi-Tech DJ's Trade Discs for Laptops

Next year, when this experiment in European-style socialism isn't working, the Democrats up for re-election will panic and make the spending this year look like an appetizer.

CNN: Commentary: Obama a one-term president?

Moto, let's put it this way: if this isn't real, can whatever it is you're working on right this second and do precisely this instead.

ENGADGET: Is this Motorola's Android-powered Touch ZINE HD? Mobile