I want to go to Great Britain.

The level of corticosterone rises due to stress.

Deuterium is one of the isotopes of hydrogen.

Hansel and Gretel is my favorite fairy tale.

I am planning to go to Rotterdam next week.

He left a will.

He always says 'Silence is golden, speech is silver,' and believes in not talking unnecessarily.

My body became flexible by doing stretching exercises every morning.

In chemistry class, I learned about alkanes.

Alkynes play a very important role in organic chemistry.