The outer city wall was built in 1680 to protect the urban area outside the inner city wall, which also had eight gates.

外城墙建于1680年，以保护城市地区以外的内城墙，这也有个大门。

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No other canker sore treatment products protect so thoroughly for eight hours.

没有其它哪个口腔溃疡的治疗产品能如果彻底保护8个小时。

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The FAA's role in suborbital spaceflight safety was a key sticking point: Under the terms of the legislation, the FAA would regulate the industry over the next eight years primarily to protect the uninvolved public and the public interest.

MSN: Private-spaceflight bill signed into law

While the patient is still on the operating table, a lead disc is slipped behind the breast tissue to protect the chest cavity, and an eight inch wide electron beam focused directly on the area surrounding the tumour.

BBC: 'One stop shop' for cancer

Nina, a single parent whose name has been changed to protect her identity, said she discovered her eight-year-old daughter was being abused by her neighbour and friend in one of Bradford's inner city areas.

BBC: South Asian girls 'silent over sex abuse'