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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。

at first
初中

na. 首先

1. At first the place was strange to me.
起先我对这个地方不熟悉。
2. At first she was flattered by his devotion.
最初他的挚爱使她感到受宠若惊。
3. She'd liked him at first, but soon lost interest.
最初她喜欢过他,但很快就失去了兴趣。
4. Some of the space will at first be used for storage.
一些空间将首先用于贮藏。
5. The situation was more complicated than they had at first realized.
形势比他们最初意识到的更为复杂。