On a speculation basis; with no assurance of profit
基于投機;對贏利沒有把握
houses built on spec; writes TV commercials on spec.投機性建房;寫電視廣告碰碰運氣
houses built on spec; writes TV commercials on spec.
投機性建房;寫電視廣告碰碰運氣
傳承國學經典 ? 弘揚傳統文化
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