This metal form is chemically treated before being covered with ink and then pressed onto paper.

VOA: special.2009.09.02

And it should be treated with limestone if the soil is acidic.

VOA: special.2009.07.07

Osteoarthritis is usually treated with pain relievers and anti-inflammatory drugs, but in severe cases, the damaged joint can be replaced with an artificial one.

VOA: standard.2010.08.11