The water in this area has a high arsenic content.

He shouted 'open sesame' towards the secret door.

His efforts were of value.

We will use arsenic in this chemical experiment.

Gallium arsenide is a type of semiconductor, widely used in high-frequency electronic devices.

Ilex aquifolium trees are often used for Christmas decorations.

The clown is a part of the circus, performing various acts to entertain the children.

This medicine promotes the secretion of saliva.