pullulate
/ˈpʌljʊleɪt/verb
no obj.［often as adj. pullulating］
1- breed or spread so as to become extremely common迅速（或大量）繁殖; 激增：
the pullulating family.
子孙满堂的家庭。
1.1
- be very crowded; be full of life and activity拥挤不堪; 充满生机和活力：
the supertowers of our pullulating megalopolis.
我们这个拥挤不堪的特大城市的超高层建筑。
派生词
pullulation
noun词源
early 17th cent.: from Latin pullulat- 'sprouted', from the verb pullulare, from pullulus, diminutive of pullus 'young animal'.