青少年时期是身体发育的关键阶段。

qīngshàonián shíqī shì shēntǐ fāyù de guānjiàn jiēduàn.

Adolescence is a crucial stage for physical development.

孩子的智力和体格在不断发育。

háizi de zhìlì hé tǐgé zài bùduàn fāyù.

The child's intelligence and physique are constantly developing.

发育不良可能影响身体健康。

fāyù bùliáng kěnéng yǐngxiǎng shēntǐ jiànkāng.

Poor development may affect physical health.