Aya talked with her friend for a long time on the phone.

This old house is covered with thatch.

His blood congealed with fear.

He goes fishing in the sea every day.

In linear algebra, the upper triangular matrix plays a very important role.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.

He believes that he is always protected by wearing that charm.

He was captured by the enemy.

Every day, I make it a point to go around the ground five times.