1.to open out sth or to open sth out
+ layer, fold展开；打开
Open out part C and rotate square 90 degrees clockwise.展开C部分, 将正方形顺时针旋转90度。
His eyes were fixed on the page I had opened out and laid flat on the desk.他的眼睛紧盯着我打开平放在书桌上的那页书。
2.(widen scope of)to open out sth or to open sth out
+ ideas拓展；开拓
three men who did much to open out our concept of self努力想要拓展我们关于自我的概念的三个人
+ discussion扩大；增加