We are developing a new transportation system.

He is making a Rube Goldberg machine at home.

He is working in a warehouse.

He is playing the role of Shou.

Einstein proposed the theory of relativity.

The War in Iraq affected many people.

Please research the interaction between these two drugs.

This area is severely arid, making it difficult for plants to grow.

My younger sister got chickenpox last week.

They got involved in an argument about politics.