Learning the Erzya language is difficult.

The International System of Units is a standard of measurement widely used around the world.

The International System of Units is the standard measurement system used by scientists all over the world.

He is learning Ancient Greek language.

This Holy Shroud is believed to have wrapped Christ's body after his death.

This olive tree was planted by my grandfather.

This mask is made of non-woven cloth.

In my house, we connect to the internet using ADSL.

The rights of LGBT people should be respected just like the rights of all people.

Old Church Slavonic is the first language written by the Slavs.