O ciddi olarak çalışmaya başladı.
- He began working in earnest.
Japonya'da yedi yılı boyunca, ciddi olarak Japonca çalıştı.
- During his seven years in Japan, he studied Japanese in earnest.
Samuel was stern, serious and deeply in earnest. He seldom smiled and never laughed. He was uncompromisingly religious, conscientious and morally unbending.