Rust was eating away the iron post.

铁锈腐蚀着铁柱。

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For this is a young wood and the iron post is old.

因为这里是幼林，而铁柱是老的。

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The dog is fastened to the post by an iron chain.

那条狗用铁索拴在柱子上了。

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Traditional fingerpost signs usually consist of a cast iron post with black and white bands, and cast iron "fingers" giving directions.

BBC: Fingerpost sign

Archaeologists have also discovered the remains of a later Iron Age village which consists of a number of round houses defined by post holes in the ground.

BBC: Complete neolithic pot found in Didcot

Margaret Thatcher's conviction, her resolve, her iron self-belief led many to see her as Britain's post-war saviour - the woman who cured the so-called "British disease", tamed trade unions and vanquished the Argentine Junta in the South Atlantic.

BBC: Baroness Thatcher