We are classmates from the same university.

His jet exceeded the speed of sound, causing a sonic boom.

The school chime rang out, 'keen-korn-karn-korn.'

He is suffering from post-traumatic stress disorder from the war.

This road is dangerous, so please walk carefully.

Akira does not want his parents to come on class observation days.

He is good at playing the electric guitar.

We are implementing a social distancing strategy to prevent the spread of the new coronavirus.

Please take one milligram of this medicine.

He is a renowned person in that field.