汤姆本人则为绘景师进度慢而感到焦躁，等得很不耐烦。

Tom himself began to fret over the scene-painter's slow progress, and to feel the miseries of waiting.

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突破并解决了目前重混凝土施工进度慢、施工质量难以控制的问题。

Have broken through and solved the problem that the construction speed of heavy concrete is slow at present, the construction quality is heavy handled.

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在实验室中进行模型实验，虽有直观、形象等优点，但通常存在费用高、进度慢等缺点。

The experimentation has the strongpoint of idiographic and visual, but it has the disadvantage of long period and high charge.

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