lethal injection
noun [ C or U ] uk/ˌliː.θəl ɪnˈdʒek.ʃən/ us/ˌliː.θəl ɪnˈdʒek.ʃən/
死亡注射（尤指作为一种死刑方式）
an injection of a drug that kills someone, especially as a punishment for committing a crime
He was executed by lethal injection in 2010. 他于2010年以注射方式被执行死刑。