But we didn't really strike a note together until maybe three or four years later.
但是，我们直到也许是三四年之后才一起开始相熟起来的。
As you can imagine this took some time and it was not until 1969 that the dam was completed and three years later that the crest gates were fitted in order to facilitate full usage.
你可以想象这项工程需要花费多长时间，一直到1969年才竣工，而顶部的闸门在三年后才安装完毕，大坝自此才投入使用。
As you can imagine this took some time and it was not until 1969 that the dam was completed and three years later that the crest gates were fitted in order to facilitate full usage.
你可以想象这项工程需要花费多长时间，一直到1969年才竣工，而顶部的闸门在三年后才安装完毕，大坝自此才投入使用。
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