Robot security guard 机器人保安
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文字稿：
Meet Bob, the metal minder.
He's on patrol in the offices of the security company G4S.
Bob does a 3D scan of each room to check if anything's missing.
This technology is just one of many new developments in the UK's robotics sector.
And while he's no substitute for a human security guard, Bob has already learned some basic office etiquette.
Bob:
"Thank you, I will be on my way."
Vocabulary 词汇:
minder 贴身保安
on patrol 巡逻
sector 行业
substitute 替身，取代
etiquette 礼仪
