Antibiotics don't work for colds, so please don't take them unnecessarily.

He has a high tolerance for difficult situations.

What is this material made of?

This bacterium is resistant to antibiotics.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

Antibiotics don't work for colds, so rest is the best.

He is an expert in bacteriology.

He is a world-renowned bacteriologist.