Similar to Linux distributions packaging management and bundles (.rpm, .deb), these gems can also be queried, installed, un-installed and manipulated through the gem end-userutility.
与 Linux 发布打包管理和 bundle（.rpm、.deb）类似，通过 gem 终端用户实用程序也可以查询、安装、卸载和操作这些 gem。
2
The paper introduced the utility function that can calibrate the service level of transportation products on the basis of the maximum principle for userutility in selecting transportation products.
为此，研究了运输产品市场选择的用户效用极大化原理，建立了运输产品服务水平量化标定的效用函数；
3
You can even fail a utility based on various values, such as object name, user ID, or the presence of some specific utility syntax.