N a flat board that can be used on the lap as a makeshift table or desk 膝板; 置于大腿上用作桌子的薄木板
He always sat in the same old armchair with a wooden board on his lap.
他总是坐在同一把旧扶手椅上,腿上放一块木板。
A board placed on his lap served for a desk.
在膝盖上摆的一块木板成了他的写字台。
The Boeing 737-300 in question was only 15 years old when its skin peeled open along a riveted lap-joint while flying above 34,000 feet (just over 10,000 metres) with 118 passengers on board.
正在讨论的波音737-300型飞机只用了15年。 当其外壳沿敲平的上端搭接接头剥落开来时,飞机上的118位乘客正飞行在34000英尺(刚刚超过10,000米)的上空。
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