ran.dan

n.Nautical （名詞）【航?！?/i>
A boat designed to be rowed by three persons.
三人劃艇：一種設(shè)計由三人劃動的船
The method of rowing such a boat, in which the persons fore and aft use one oar each and the person amidships uses two.
三人劃艇法：劃動這種船的方法，前后兩人各執(zhí)一個槳，中間一人執(zhí)雙槳

來源：
[Origin unknown]
[詞源不明]