Looking at that person's behavior, I feel like they have some secret.

The police used tear gas against the demonstrators.

Fergus is my best friend.

This factory has significantly reduced its carbon dioxide emissions.

Fougasse is one of my favorite types of bread.

We need to replace the gasket of this engine.

He lost consciousness due to the effects of nerve gas.

Reducing greenhouse gas emissions is important for environmental protection.

I like listening to the sound of crickets in the garden.

In this graph theory, it is important to calculate the outdegree of each node.