get rusty造句

Knives get rusty when not sharpened.

Keep up your English, or it will get rusty.

If the machinery were not maintained properly, It would get rusty as time passes.

Left in the rain [/i], the metal will soon get rusty.

FRP light pole,in its service life,will not get rusty,not easy to be scrapped and no need to be weather-resistance is bettor than that of wood,aluminum,steel and cement ones.