draw a bead on
准确地瞄准或锁定目标
口语·表示精准瞄准或锁定目标
英文释义
to take aim at or focus on something or someone
例句
The sniper drew a bead on the target and waited for the perfect moment to fire.
典故来源
源自枪械瞄准术语，“bead”指枪管前端的准星，瞄准时需将准星对准目标，引申为精准锁定目标。