?
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。

change tack

美 / tʃeɪndʒ tæk /
un. 变换航向

1. It was a brave decision to change tack in the middle of the project.
在项目进行过程当中改变方针是个大胆的决定。
2. He was forced to change tack.
他被迫改变方法。
3. But the failure to change tack may prove costly, leading to slower growth and larger fiscal burdens.
如若政策转变失败,代价是高昂的,它将会导致经济增长缓慢以及财政负担加重。
4. You'd think she'd change tack - but no. 95 people were subjected to a talk on a subject they had no interest in.
你也许认为她会改变方向,但并非如此,剩下那九十五人被迫听了他们不感兴趣的演说。
5. Yet the discovery near Qom gives Iran a chance to change tack—though it has forgone several such chances in the past.
但是,科姆附近铀浓缩工厂的发现给了伊朗一次改变思路的机会---虽然过去已经放弃了几次这样的机会。