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isobath n.等(水)深線。

isobutylene

The distribution of euphausia snperba in the prydz bay region was very patchy , its abundance was higher in the slope area ( the pelagic area between the isobaths 1000 m and 3000 m ) than the open sea area ( the pelagic area beyond the 3000 m isobath ) 大磷蝦在普里茲灣海區的分布呈斑塊狀。分布趨勢是陸坡區(在1000和3000米等深線之間的海區)各站的豐度普遍大于深海區(大于3000米深度的海區)各站的豐度。