据美国西部木材产品协会和南方森林产品协会的统计,2005年,美国木材生产创下405亿板英尺的最高产量,到2009年骤减到234亿板英尺。
U.S. lumber production peaked at 40.5 billion board feet in 2005 and plunged to 23.4 billion in 2009, according to Western Wood Products Association and Southern Forest Products Association estimates.
例如,一款在售的可折叠太阳能电池板,尺寸约12平方英尺,产生62瓦峰值功率。
For example, one commercially available foldable solar panel measures about 12 square feet and produces 62 watts of peak power.
较大的房间呈长方形,有一个高约30英尺的天花板,两边的长廊高达屋顶。
The larger room was rectangular, had a ceiling height of about 30 ft, and side galleries running its full length.
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