... without a single success 一事无成 Mostly Without Success 但大多不成功 With Or Without Success 与或没有成功 ...
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做这种研究可能是非常尝试，与或没有成功。
Doing this kind of research can be very trying, with or without success.
你觉得有可能带来额外收入，但没有时间来完成的某个小项目或附加软件，做与不做，也许你的生意便有成功和失败的不同。
The small extra projects and add-ons that you think might bring extra revenue, but haven't had time to finish, may make the difference between the success or failure of your business.
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