This scarce mineral is very expensive.

It's high temperature today, it's hard to go out.

Rhenium is a rare metal with stable characteristics at high temperatures.

Understanding the characteristics of that plant is very important for growing it.

This company is very stable.

This machine has a function to even out the current.

He was holding my hand tightly.

He was running while holding a bag.

He always carries an umbrella around.

This metal is very hard.