purr
/pɜ:(r); pə/ v [I, Ipr]
(a) (of a cat) make a low continuous vibrating sound （指猫）发低而连续的呼噜声
purring happily 快活地呼噜作声.
(b) (of machinery) make a similar smooth vibrating sound （指机器）发低沉而连续的呼隆声
a car engine purring smoothly 汽车发动机平隐地呼隆作响. purr, n purring sound （猫的）呼噜声; （机器的）呼隆声
the contented purrs of the cat 猫表示满足的呼噜声.