This shell's outer lip has a very beautiful pattern.

He was struggling to perform external rotation of the shoulder.

He is spending a lot of time on experimental research.

We should always remember the power of Kannon in difficult times.

The National Research and Development Agency plays a crucial role in advancing science and technology.

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

He is a foreigner, but he can speak Japanese fluently.

I have been to Outer Mongolia.

Coitus interruptus is one method of contraception, but it is not completely reliable.