He was ruing his past mistakes.

He stared at the corpse, trembling with fear.

He is an expert in analytical mechanics and deeply understands its theory.

We shared the progress of the project in a video conference.

The Taiwan Strait is the strait that separates China and Taiwan.

I look forward to going to the sea for a swim with my family during the summer vacation.

We went to the swimming beach with our family during the summer vacation.

He was promoted to Admiral of the Fleet.

It is generally believed that the life of the middle class is stable.

We discussed the new project in the meeting room.