I picked up shells on the seashore.

He struggled to understand the meaning of that lexeme.

The US-Soviet Cold War was a significant turning point in world history.

He turned fifty.

He is completely dependent on coffee.

We attended the cornerstone laying ceremony of the new building.

Old scientists discovered that calcium was important for bone health.

In organic chemistry, isocyanides are known for their distinctive odor.

This compound is stabilized by hydrogenation.

He hydrogenated fatty acids in a chemical experiment.