两端圆形木头绑在一起做成一个桅杆，一张用布编织成的帆挂在一个十字型的杆上。
Two long logs were lashed together to make a mast, and a sail of woven cloth hung from a cross-pole.
工作原理：光子击打在一张用超薄材料制作的巨大的帆上。
How it works: Photons strike an immense sail of ultrathin material.
船上只挂了一张帆，因为没有一丝儿风吹动。 水手们正坐在护桅索的周围和帆桁的上面。
A large ship, with three masts, lay becalmed on the water, with only one sail set; for not a breeze stiffed, and the sailors sat idle on deck or amongst the rigging.
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