The software must be both easy to use and complete.
这个软件必须易于使用和完成。
These are generally quick and easy both to install and use.
这些通常能快速简便地进行安装和使用。
The method above is easy to use both for quantitative and qualitative problems.
此方法应用简单，既能处理定量问题，又能处理定性问题。
The method above is easy to use both for quantitative and qualitative problems.
此方法应用简单，既能处理定量问题，又能处理定性问题。
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