He asked me about the secret, but I remembered the proverb 'to fall into speaking', and said nothing.

This sushi is so delicious that it's jaw-dropping.

I draw my eyebrows using an eyebrow pencil.

I lost my mechanical pencil, so I'm going to buy a new one.

My new fountain pen is easy to write with.

My new pen tablet is very easy to use.

We will use pentane in this chemistry experiment.

He was writing a letter with an old-fashioned quill pen.

Propene plays an important role in organic chemistry.

I used pentyne in an organic chemistry experiment.