sometimes it worked
有时是有效的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Sometimes it worked - up to a point.
BBC: Peter Hain tipped to leave Labour frontline politics
Sometimes in his experimentation, he recalled, he tried something and it worked well.
UNESCO: Title
Men whose lives are filled with gifts and opportunity, men who have worked hard to achieve, risk it all and sometimes lose it all.
CNN: Are men stupid?
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