not long since

基本解释

It was not long since that I returned.
我是在不久前回来的。
It is not long since educational geography is put forward in Chinese which has important theoretical significance and practical significance.
教育地理学在中国的提出时间虽然不长，但教育地理学的研究具有重要的理论意义和实践意义。
It is not long since the Chinese art and design history has been put forward as an independent study; thus the research method hasn t become a system yet.
中国艺术设计史作为一门独立的学科被提出，时间并不长，其研究方法尚未成体系。

The Fed has not tried to influence long-term rates this way since the nineteen sixties.
This would be good luck if you were long and now suddenly you got a huge return that you would not have thought was possible since you've never seen it before.
如果你长期持有这份投资,你就走运了,回报如此之高,你自己都没有料到,可能你也从来没有见过这种情况
耶鲁公开课 - 金融市场课程节选

The children kept their eyes fixed on the psychiatrist, who adopted a maternal attitude, though not for long, since she soon noticed, as she later explained to Pereda, a malevolent intention in their gaze, a mischievous plan formulated, so she felt, in a language full of consonants, shrieks, and resentment.
NEWYORKER: The Insufferable Gaucho
South Korea has long made its investment and savings plans on the assumption of double-digit interest rates: not since the long boom began in the 1960s has the cost of borrowing fallen below 10%.
ECONOMIST: South Korea’s alarming recovery