Her sexual feeling was heightened by his touch.

He faced the difficulties with a fearless and determined expression.

His fearless determination impressed the people around him.

The male reproductive organs include the vas deferens.

We should avoid interfering in the domestic affairs of other countries.

Where is the entrance to this place?

You can see the true strength of the sumo wrestler in the official sumo tournament.

This algorithm was developed for optimization.

We need to optimize this process.

It is difficult to find the optimal solution to this problem.