旋回 回转中释
He had been caught in a vortex and was being whirled on with a velocity of advance and gyration that made him giddy and sick..一个巨大的漩涡紧紧地抓住了他，他的身体随着漩涡快速前进，快速旋转；他眼花缭乱，头晕目眩，想要呕吐出来。 转眼间他被狠狠地摔在左岸下方的砂砾上。
radius of gyration,回转半径
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