Birds of a feather may flock together but opposites don't really attract each other.

人以群分,反差太大，不容易吸引对方。

耶鲁公开课 - 心理学导论课程节选

As if Google didn't have enough on its plate, it seems the Mountain View company is adding yet another feather to its cap by entering the delivery business.

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You can feed the monsters by hand, stand on their giant eggs (which won't crack under a 250-pound human's weight) and visit the craftsmen who make feather dusters.

FORBES: Magazine Article

Stein's decision to examine the feather trade through the prism of Jewish history may seem odd at first, but the correlation isn't forced.

FORBES: Magazine Article