?
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。

speak about

美 / spiːk əˈbaʊt /
na. 讲起

1. Professor Wilson was invited to speak about the results of his research.
威尔逊教授获邀就自己的研究成果发言。
2. They have made a pact with each other not to speak about their differences in public.
他们彼此达成协议,不公开谈论他们的歧见。
3. The servants are not allowed to speak about me.
仆人们不允许谈到我。
4. I shall speak about it at the first opportunity.
我一有机会就讲。
5. I want to speak about how we apply these principles in practice.
我要谈谈我们在实践中是如何应用这些原则的。