/pɜ:k; pɝk/
v (phr v) perk up (infml 口) become more cheerful, lively or vigorous, esp after illness or depression 愉快、活跃或振作起来（尤指病後或曾消沉）
*He looked depressed but perked up when his friends arrived. 他看上去无精打彩的, 但朋友一来就精神起来了. perk sb/sth up (infml 口)
(a) make sb feel more cheerful or lively 使某人快活或活泼起来
*A holiday would perk you up. 一放假你就快活了.
(b) make sb look smarter 打扮某人
*He had perked himself up for the occasion. 他为此事打扮了一番.
(c) make (an outfit, aroom, a garden, etc) look smarter, better, more vigorous,etc 使（服装、房间、花园等）美观、精神
*perk up the plants with a good watering 给花草浇足水使之精神
* You need a bright red scarf to perk up that grey suit. 你围上一条大红围巾能显得那套灰西装更漂亮.
3 lift up (one's head or ears) 昂起（头）; 竖起（耳朵）
*The horse perked up its head when I shouted. 我吆喝时那马扬起了头.

/pɜ:k; pɝk/
n (usu pl 通常作复数) (infml 口)
(a) money or goods received as a right in addition to one's pay; perquisite （工资以外的）财物补贴, 额外收入, 津贴, 奖金, 小费
*His perks include a car provided by the firm. 他的额外津贴包括公司提供的一辆汽车.
(b) advantage or benefit of a particular job, one's position, etc （工作、职位等带来的）好处, 利益, 便利, 特权, 优待
*One of the perks is the use of the official car park. 其中一项好处是可以使用公家的停车场.

/pɜ:k; pɝk/
v = percolate 1.