By training the orbicularis oris muscle, your expressions become more expressive.

He loves the performance of rinyu-gaku.

I often go bouldering on weekends.

Oxyrhynchus was an ancient city in Egypt.

He is attending school to obtain a motorcycle license.

I practice English hearing every day.

This microphone is unusable due to severe audio feedback.

She was enjoying a walk in the mixed forest.

Ayako is my best friend.

Linear programming is a part of operations research and is used to find the optimal solution.