foundation
n.[ pl.]地基;基础;基金会;建立，创办
It took the builders three weeks to lay the foundations .建筑工人花了三星期的时间打地基。
fraction
n.小部分，片断;分数
She paused for a fraction of a second.她略微停顿了一下。
fragile
a.易碎的，脆的，易损坏的;虚弱的，脆弱的
fragile bones脆弱的骨头
indicate
vt.标示，指示，指出;表明，示意
Long skid marks on the pavement indicated the driver had attempted to brake.人行道上留下的长长的滑行痕迹表明司机曾试图刹车。
