?
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。

by chance
高中

美 / baɪ tʃæns /
na. 偶然

1. I saw the letter purely by chance.
我看见这封信纯属偶然。
2. Several years after they'd split up they met again by chance in Paris.
他们分手几年以后在巴黎又偶然相遇。
3. In this house nothing is there by chance: it is always the result of great deliberation.
在这房子里,没有什么东西是偶然的——总是非常仔细考虑后的结果。
4. I came here by chance and was just watching what was going on, when this girl came up to me.
我碰巧来到这里,正在看热闹,这时一个女孩向我走来。
5. Danielle was among the last to find out, and as often happens, too, she learned of it only by chance.
丹妮尔是最后一个才知道的人之一,而且同往常一样,她也只是偶然听到的。