Once I saw the projected sales figures for next quarter, I knew it was going to be a good year. 一旦我看到下个季度的预期销售数据，我就知道今年公司的经营状况良好。
(to do something) once: （做某事）一次
I've only been there once. 我只去过那里一次。
If I've told you once, I've told you a hundred times. 我告诉你多少次了。
UK: Once I saw the projected sales figures my mind was at ease.
US: I have only been to Senegal once in my life, but it was the greatest trip ever.