贸易风

tā zhǐ xiāo píng mào yì fēng chuī zài shēn shang de gǎn jué hé fān de dòng xiàng jiù néng zhī dào

他只消凭贸易风吹在身上的感觉和帆的动向就能知道。

He only needed the feel of the trade wind and the drawing of the sail.