cod
n
(pl unchanged 复数不变)
1 (also `codfish) [C]
large sea fish 鳕.
2 [U] its flesh eaten as food (食用的)鳕鱼肉.
COD
1 (Brit) cash on delivery 货到付款.
2 (US) collect (payment) on delivery 货到收(款).
Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land.