This plant needs oxygen to perform photosynthesis.

The cornerstone of his success was his effort and determination.

Su was resurrected from the dead.

He was staggering because he was drunk.

He was blocking the road.

Last night, I went to see a movie with my friends.

It takes twenty minutes to get to my house.

The pool water is disinfected with chlorine.

Boron is one of the elements widely distributed in the earth's crust.

Fluorine is one of the chemical elements, and its symbol is F.