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 adj 无效果的,失败的We made an ~attempt to secure that order. 为获取那笔定货,我们曾做过一次失败的尝试。This sales plan might prove ~but it is worth trying out. 这一销售计划也许不能成功,但值得试一试。......(本文共 132 字) [阅读本文] >>