His behavior was incomprehensible, and I was puzzled.

He was sitting on the stump in the garden, reading a book.

How can I slow down the playback speed of this video?

He tied a red rope at the shrine.

Global warming is a big issue that affects all of us.

He is an expert in geophysics.

He believes in the geocentric theory.

A terrestrial planet may have an environment similar to Earth.

This food spoils quickly, so please eat it right away.

He deeply regrets that decision.