... 干旱期；持续一段时间的干旱天气 dry spell 持续很长一段时间的 continuing for a long time 过一段时间 in on time ...
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持续很久的;长时间的
基于1个网页-相关网页
continuing for a long time
持续了很长时间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
International studies of language middle construction have been continuing for quite a long time.
国际上对中间结构的研究有较长的历史。
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The USA has been working diligently for a long time to protect IP globally, but China is a continuing problem.
FORBES: Currency Manipulation is NOT the Biggest Chinese Threat
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