iron是可数还是不可数

I'll need to iron that dress before I can wear it.

我得先把那件连衣裙烫平再穿。

She was known as the ‘ Iron Lady ’.

大家都称她为“铁娘子”。

Iron reacts with water and air to produce rust.

铁和水及空气发生反应产生铁锈。

Iron the garment on the reverse side.

这件衣服要从反面熨。

This iron is guaranteed for a year against faulty workmanship.

这种熨斗如有工艺缺陷可保修一年。