含义解释
短语 "back someone up" 是一个常见的英语动词短语，意思是“支持某人”、“为某人撑腰”或“在某人需要时给予帮助”。这种支持可以是言语上的（如作证、辩护），也可以是行动上的（如协助完成任务）。
常见用法
- 在争论中支持某人： “Don’t worry, I’ll back you up if your boss questions your report.”
- 提供证据或证词： “Her alibi was backed up by security camera footage.”
- 协助完成工作： “We need more staff to back up the team during the product launch.”
实用例句
- My friend always backs me up when I’m in trouble.
- Can you back up your claim with data?
- The police officer asked for backup before entering the building.
近义表达
- Support someone
- Stand by someone
- Have someone’s back
- Defend someone