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A bridge over the river可以是跨越横跨河面的意思，也可以是在河面之上的意思吗？
网校学员微信用**在学习英语零基础直达大学六级全能畅学卡【现金奖励班】时提出了此问题，已有1人帮助了TA。
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Rita_Shi
同学你好，该知识点来自沪江网校《英语零基础直达大学六级全能畅学卡【现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。
同学好lay sth by sth不是一个固定用法
本句中有一个固定搭配：lay the foundation of 给...打下基础, 为..奠定基础
by 表示方法，手段。即“用。。。， 通过。。。。”相当于by means of
如：
All work had to be done by hand 所有的工作都是手工进行的。
He makes a living by teaching 他以教书为生。
整句话翻译：他通过学习和努力工作奠定了成功的基础。
祝学习愉快！
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英语零基础直达大学六级全能畅学卡【现金奖励班】
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