He worked as a rear gunner in a fighter plane.

The sperm whale is a large whale that lives in the deep sea.

His inconsistency of words and action is the problem.

He always strives for consistency in his words and actions.

Infection with candida is particularly dangerous for people with weakened immune systems.

Lepidocrocite is a type of iron oxide mineral, which is reddish-brown in color.

He is an expert in fiber optics.

I contacted the police using a payphone.

He is known as an expert in palaeoclimatology.

I am enjoying sunbathing on the beach.