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Sometimes it takes but a single pebble to start an avalanche .

有时候只要一颗石子就能触发一场雪崩。

Happiness is like a pebble dropped into a pool to set in motion an ever-widening circle of ripples .

快乐就像是一块被丢进池塘的卵石泛起阵阵涟漪。

But the wily ant on the right is standing on a pebble to gain a solid inch over his nemesis .

右边的这只狡猾的蚂蚁站在一颗石子上，以比它的仇敌高出那么一英寸。

Back then , japanese investors bought u. s. landmarks such as new york 's rockefeller center and the pebble beach golf course in california .

当时日本投资者收购了纽约洛克菲勒中心（rockefellercenter）、加州卵石滩高尔夫球场等地标性资产。

It has not learnt to hop and has an ingenious way of evading predators - it pulls its head in and rolls down the cliff like a pebble

它没能学会跳跃，但它有躲避天敌的巧妙方法---将身子缩成团，像卵石一样顺着悬崖滚下去。