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查询技巧:
1、输入单个单词准确查询。
2、使用%模糊查询,匹配任意长度字符:
   %a    以a结尾的单词;
   ab%    以ab开头的单词;
   %ac%    含有ac的单词。
3、使用_模糊查询,匹配单个任意字符:
   _a_    三位且a在中间的单词;
   _ad    三位且ad结尾的单词;
   ac_    三位且ac开头的单词;
   _a    两位且a结尾的单词;
   a_    两位且a开头的单词。
4、带连字符-的单词,需含-字符才能模糊查询,如well-know需输入 well-% 。
5、在手机键盘上,如果g上有%和v上有_,则可长按输入。

previously
高中

英 / ˈpriːviəsli /
美 / ˈpriːviəsli /
adv. 预先;在前

1. His statement ran athwart what was previously said.
他讲的话与先前所说的相抵触。
2. The contract was awarded to a previously unknown company.
该合同给了一家先前不知名的公司。
3. Guyana's railways were previously owned by private companies.
圭亚那的铁路先前为私营公司所拥有。
4. Radiation may damage cells in a way that was previously unforeseen.
辐射也许会以以前未预见的方式损坏细胞。
5. I should like to add a corrective to what I have written previously.
我想对我先前写的内容进行补充修改。