once or twice

例句：

1. The American housewife probably goes shopping only once or twice a week.
   美國家庭主婦可能一星期只購物一、二次。
2. She referred to it once or twice.
   這一點她提到了一兩次。
3. Mary comes around to see her parents once or twice a week.
   瑪麗每星期來看她的父母親一兩次。
4. I don't know the place well, I've only been there once or twice.
   我對那地方不大熟悉，只去過一兩次。