那只鹦鹉正忙着用喙梳理自己的羽毛。

The parrot is busy ___preening its feathers with its beak.

他在浴室里对着镜子精心打扮了半小时。

He spent half an hour in the bathroom ___preening in front of the mirror.

她在派对上不停地炫耀自己新买的钻石项链。

She kept ___preening about her new diamond necklace at the party.