to... extent: used to show how far something is true or how great an effect it has 到...程度;在...程度上
To a certain extent, we are all responsible for this tragic situation. 我们都在一定程度上对这悲惨的局面负有责任。
He had changed to such an extent(= so much)that I no longer recognized him. 他变得我简直认不出了。
To some extent what she argues is true. 她的论证在某种程度上是符合事实的。
The pollution of the forest has seriously affected plant life and,to a lesser extent, wildlife.森林污染严重影响了植物的生存，其次也对野生动物造成了影响。
To what extent is this true of all schools? 这在多大程度上符合所有学校的实际情况？
The book discusses the extent to which(= how much)family life has changed over the past 50 years. 本书论述了近 50 年来家庭生活的变化程度。
Hold water: 有道理,合情合理
not hold water: if an argument, an excuse, a theory, etc. does not hold water, you cannot believe it (论点、借口、理论等)站不住脚,不合情理
I'm sorry, but your story just doesn't hold water. 真抱歉,可是你的话不合情理.
a walk of life: a person's job or position in society 行业;职业;地位;阶层
She has friends from all walks of life. 她在社会各界中都有朋友.