?
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。

on offer
高中

na. 出卖

1. More than 20 subjects are on offer at AS level at our college.
本校提供20多门高级证书辅助考试学科。
2. More than 20 subjects are on offer at A2 level at our college.
本校提供20多门A2证书考试课程。
3. What was on offer that day was a pair of tickets for a New York musical.
那天提供的是两张纽约音乐剧的门票。
4. By manipulating the amount of money on offer in each situation, Cohen and his collaborators could watch this neural tug of war unfold.
通过操纵每种情况下提供的资金数量,科恩和他的合作者可以观察到这种神经拉锯战的展开。
5. He took all the freebies that were on offer.
他取了可得的全部免费品。