?
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。

one or two

na. 一两个

1. Each of these exercises takes one or two minutes to do.
这些练习题每一道要花一两分钟做完。
2. When his cows calve each year he keeps one or two calves for his family.
每年他的母牛产犊时,他都为家里留下一两头。
3. Everyone benefited from limiting their intake of coffee to just one or two cups a day.
每个人都从每天限量喝一杯或两杯咖啡的做法中受益了。
4. It needs one or two years' relative experience.
需要一到两年相关经验。
5. There're also one or two rapes on campus every semester.
每学期也有一两起校园强奸案。