He doesn't mind other people's opinions much.

He is good at playing the erhu.

Despite his promise, he didn't come.

He attacked the enemy's position using a grenade launcher.

He moved swiftly to avoid the enemy bullet.

This jar contains a mineral called realgar, which was used as an ancient medicine.

Mr. Kuroda is my best friend.

Kitagawa is my best friend.

He broke his arm, so he had bonesetting done.

He is a bonesetting specialist and has treated many people's fractures.