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N either of a pair of fore-and-aft timbers fixed horizontally on opposite sides of a lower masthead to support an upper mast 樯头纵材 [nautical]
The next day, he set up the trestle table we had bought under a tree, and there he worked with his shirt off, and singing.
第二天，他在树下支起了买来的工作台，卷起袖子，哼着歌开始工作了。
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