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1·I walked aft until I reached the mainmast.

我向船尾走去，来到了主桅前。

2·Two-masted vessel square-rigged on the foremast and fore-and-aft rigged on the mainmast.

两个有桅的船成直角的垂在前桅并且船头和船尾在主桅上。

3·Two-masted vessel square-rigged on the foremast and fore - and-aft rigged on the mainmast.

两个有桅的船成直角的垂在前桅并且船头和船尾在主桅上。

4·The breaking of her mainmast, she had great damage on board, and that a great part of her cargo was spoiled.

船的中桅折断了，船受了大伤，大部分的货物都损失了。

5·Nautical A fore-and-aft rigged sailing vessel with at least two masts, a foremast, and a mainmast stepped nearly amidships.

一种纵帆装置的航船，至少有二根桅杆，一根前桅，在靠近船的中部有一根主桅杆。