Watching a total eclipse of the moon is truly an emotional experience.

We went to the supermarket to buy food.

Sexual reproduction is one of the methods of reproduction in organisms.

Have you ever told her 'I love you' directly?

His heart is vague and dark.

The phrase 'the good and bad deed cancel out' perfectly describes his past actions.

The Aisin Gioro was the imperial family of the Qing Dynasty.

The steepest descent method is one way to solve optimization problems.

Based on the Air Pollution Control Law, factories must strengthen the management of exhaust gases.

The Riemann sum is a method for approximately calculating the integral of a function.