In severe cases, cracks can form or it can snap apart.
ひどくなると、亀裂が生じたり、断裂することもあります。
Experience without learning is better than learning without experience.
亀の甲より年の功。
The small island looked like a tortoise from a distance.
遠くからは、その小さな島は亀のように見えた。
Also cracks may form in buildings that aren't Earthquake proof.
耐震性の悪い建物に亀裂が生じることもある。
Soviet and Western observers have warned that if the Muslim republics do not join the commonwealth, they may from a separate group, setting up a volatile ethnic and religious split.