stone age

US /ˈstoʊn ˌeɪdʒ/
UK /ˈstoʊn ˌeɪdʒ/
"stone age" picture
1.

石器時代

a prehistoric period when weapons and tools were made of stone or of materials such as bone, wood, or horn

:
Humans lived in caves during the Stone Age.
人類は石器時代に洞窟に住んでいた。
Archaeologists found artifacts from the Stone Age.
考古学者は石器時代の遺物を発見した。
2.

原始時代, 時代遅れ

a very primitive or outdated period or way of life

:
Their technology is still in the Stone Age.
彼らの技術はまだ石器時代だ。
Living without internet feels like the Stone Age.
インターネットなしで生活するのは石器時代のようだ。