Science is the solution to stem rust, not the cause of its return.
科学是根茎锈病的解决办法，而不是其复发的原因。
2
Please making sure to dry your hands when open the door that for fear water (or other solution) to rust locks and handle.
开启门时请务必将双手擦干，以免水渍（或其他溶液）造成把手生锈。
3
In order to obtain rust, brown, gun-black and ancient green films on brass at room temperature, the chemical coloring process on brass in acid solution was studied.