index card

US /ˈɪn.deks ˌkɑːrd/
UK /ˈɪn.deks ˌkɑːrd/
"index card" picture
1.

索引卡片, 卡片

a small card used for writing notes, often for organizing information or for studying

:
She wrote her presentation notes on index cards.
她把演示文稿的筆記寫在索引卡片上。
He used index cards to study for his history exam.
他用索引卡片複習歷史考試。