冬の期間中、夜は長く穏やかです。

During the winter period, the nights are long and peaceful.

氷河期の間、地球の風景は巨大な氷の層によって形作られました。

During the Ice Age, the Earth's landscapes were sculpted by massive layers of ice.

彼は試用期間中に仕事に対する大きな献身を示しました。

During his probationary period, the employee demonstrated great dedication to his work.

試験期間中、生徒たちは勉強により多くの時間を充てます。

During exam periods, the students dedicate more time to studying.