Steel and iron products are often coated lest they should rust.

钢铁制品常常涂上油漆以免生锈。

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Steel and iron products are often coated lest they should rast.

钢铁制品常常涂上保护层以防止生锈。

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Steel and iron products are often coated lest they should rast.

钢铁制品常常涂上保护层以防止生锈。

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