In the beginning, Special English had one fifteen-minute news show that was broadcast to Africa and Asia once a day.

VOA: special.2009.10.16

Remember, this thing only runs for sixty days and you could compute your sixty-day return, but people like to compare annual returns-- once again, a tradition we have.

注意,这个债券期限只有60天,当然你可以计算60天的收益率,但是人们往往喜欢用年收益率进行比较,这也是一种传统

耶鲁公开课 - 金融市场课程节选

every single day I actively work on that, because I'm here once,

每天我都努力地做，因为我只能活一次，

我的理想是 - SpeakingMax英语口语达人

The London Bullion Market Association sets the gold fix twice a day and the silver fix once a day.

FORBES: FOCUS: News Of Possible Probe Of London Fixings Raises Eyebrows In Gold Market

Tablet news consumers who get news more than one time during the day are also twice as likely as those who get news once a day to have paid for news on their tablet (10% versus 4%).

ENGADGET: Pew Research finds 22 percent of adults in US own tablets, low-cost Android on the rise

Second, ETFs can be traded any time during the trading day--unlike mutual funds, which can be bought or sold only once a day.

FORBES: Can the exchange-traded fund replace the mutual fund?