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