He monitored the enemy's movements using a periscope.

He wrote a message using mirror writing.

There is a state-of-the-art electron microscope in my laboratory.

The retired regent prime minister, Saionji Kintsune, was a court noble and politician during the Heian period in Japan.

He is doing special exercises to train his serratus anterior muscle.

He exercises every day to strengthen his tibialis anterior muscle.

Let's participate in the election by using early voting.

Let's participate in the election by using early voting.

An abnormality was observed in his anterior chamber.

She was diagnosed with placenta previa.