prior例句
        Just phone in your order three or more days 
prior to departure.
在出发的三天之前打电话预订即可。
For the 
prior year, they reported net income of $1.1 million.
他们公布上一年度纯收入为110万美元。
Although not essential, some 
prior knowledge of statistics is desirable.
统计学的知识虽非必要,但最好是学过一点。