His words carry importance.

The military officer attached to the embassy plays a crucial role in gathering military information of that country.

Ceremonial family occasions are traditional family events in Japan.

This software has backward compatibility.

This eigenfunction is one of the fundamental concepts of quantum mechanics.

The poster girl of that shop is very kind and always welcomes customers with a smile.

This old radio uses a cold-cathode tube.

The launch of intercontinental ballistic missiles has become an international issue.

It is said that secondhand smoke has a negative impact on health.

Topology is a branch of mathematics that abstracts and generalizes the concept of space.