What's more, says David Keith who directs the University of Calgary's Energy and Environmental Systems Group, it would be pretty easy to do.
而且，卡尔加里大学能源和环境系统小组的负责人大卫·基思说，要这么做很容易。
The team also featured David Beckham, Ryan Giggs and Nicky Butt, while Robbie Savage and Keith Gillespie were on the bench.
当时球队阵容中还包括贝克汉姆，吉格斯，而野人萨维奇，吉莱斯皮是球队的替补。
The team also featured David Beckham, Ryan Giggs and Nicky Butt, while Robbie Savage and Keith Gillespie were on the bench.
当时球队阵容中还包括贝克汉姆，吉格斯，而野人萨维奇，吉莱斯皮是球队的替补。
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