The interface between new and old concrete is often weak.

新老混凝土界面往往是混凝土结构的薄弱界面。

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The research on adherence of the new-to-old concrete has become profound significance.

对新老混凝土的粘结问题的研究具有深远的现实意义。

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The architects left the raw character of the old concrete facility intact, and suspended the pool above, at the top of the hill.

建筑师保留下了山顶上旧混凝土设施的原始特征，完好无损，并在上面悬浮设计水池。

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Wak isn't much to look at: a few potholed streets with 30-year-old concrete homes of German design.

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It skillfully incorporates the upgraded services that could not be threaded through the old solid concrete walls.

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Beyond that the 49-year-old actress has no concrete plans.

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