彼は子供の頃から病弱で、よく学校を休んでいました。
Kare wa kodomo no koro kara byoujakude, yoku gakkou o yasunde imashita.
He was sickly since childhood and often missed school.
病弱な体質でも、適切な養生で健康を維持できます。
Byoujakuna taishitsu de mo, tekisetsuna youjou de kenkou o iji dekimasu.
Even with a frail constitution, health can be maintained with proper recuperation.