They decided to widen out the river to avoid the flooding.

他们决定加宽河流以防洪水泛滥.

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We shall have to widen out the river bed to avoid flooding.

我们将加宽河床以防洪水.

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One's eyes widen ( out of anticipation for what will happen next )

眼睛睁大 ( 期待将发生什么 )

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We shall have to widen out the road.

我们必须加宽这条公路.

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We have to widen out the system so as to include all the modern developments.

我们得扩充这一体系以便把把有的现代发展都包括进去.

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