?
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。

white as a sheet

美 / waɪt æz ə ʃiːt /
苍白如纸;极苍白的;脸色很苍白

1. He was as white as a sheet.
他面无血色。
2. She went white as a sheet when she heard the news.
她听到这消息时脸色变得煞白。
3. Tom turned as white as a sheet.
汤姆脸色煞白。
4. Her face turned as white as a sheet.
她的脸色变得苍白如纸。
5. When he returned, he was white as a sheet and could hardly speak.
他回来时脸色煞白,一句话都说不出来。