He is looking outside from the window now.

We will use arsenic in this chemical experiment.

There are a lot of arrowheads growing in this pond.

Her ring was shining with a diamond in the shape of a rhombus.

There are a lot of water caltrops growing in this pond.

As I walked through the haze, I could see nothing.

Arsenic is one of the elements widely distributed in nature.

This water is dangerous to drink because it contains arsenic.

His life is truly miserable.

The petals are flying around because the wind is strong.