The economical and industrial importance of the union of coal and iron(2) in the British Isles cannot be over-estimated.

对于英国，煤炭和钢铁加在一起对其经济和工业的重要性怎么强调也不过分。

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The economical and industrial importance of the union of coal and iron(2) in the British Isles cannot be over-estimated.

对于英国，煤炭和钢铁加在一起对其经济和工业的重要性怎么强调也不过分。

youdao