还在学习 Angular 并开始使用种子 Angular 应用程序骨架。
在那里，我遇到了通过 npm/bower 实现 angular-material 库和 CSS 的问题。
那是我的问题：
$ bower install angular-material
bower angular-material#* cached https://github.com/angular/bower-material.git#1.1.4
bower angular-material#* validate 1.1.4 against https://github.com/angular/bower-material.git#*
bower angular-animate#^1.4.8 cached https://github.com/angular/bower-angular-animate.git#1.6.4
bower angular-animate#^1.4.8 validate 1.6.4 against https://github.com/angular/bower-angular-animate.git#^1.4.8
bower angular-aria#^1.4.8 cached https://github.com/angular/bower-angular-aria.git#1.6.4
bower angular-aria#^1.4.8 validate 1.6.4 against https://github.com/angular/bower-angular-aria.git#^1.4.8
bower angular-messages#^1.4.8 cached https://github.com/angular/bower-angular-messages.git#1.6.4
bower angular-messages#^1.4.8 validate 1.6.4 against https://github.com/angular/bower-angular-messages.git#^1.4.8
bower angular#1.6.4 cached https://github.com/angular/bower-angular.git#1.6.4
bower angular#1.6.4 validate 1.6.4 against https://github.com/angular/bower-angular.git#1.6.4
bower angular#1.5.11 cached https://github.com/angular/bower-angular.git#1.5.11
bower angular#1.5.11 validate 1.5.11 against https://github.com/angular/bower-angular.git#1.5.11
bower ECONFLICT Unable to find suitable version for angular
我该如何解决？