。
She bent down and picked up a coin.
Literal
She [topic-は] body [object-を] stooped [then-て] coin [object-を] picked-up.
コイン is an English loanword that has largely displaced the native 硬貨 (こうか) in everyday speech. While 硬貨 remains the formal term, コイン is the default casual word for coins. The sentence uses the plain verb 拾う ('pick up') rather than the compound 拾い上げる, giving it a simpler and more conversational feel.