[mass noun]unwanted material or goods that have been thrown overboard from a ship and washed ashore, especially material that has been discarded to lighten the vessel (尤指为减轻船只负重,从船上抛弃被冲到岸上的)投弃物,投弃货物。 比较 flotsam
flotsam and jetsam
see flotsam
语源
late 16th cent. (as jetson): contraction of jettison