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1·The ship is engaged in pelagic fishery.

这艘船从事远洋渔业。

2·The income thereof shall be derived from the business operations of pelagic fishery.

必须是从事远洋捕捞业务取得的所得。

3·Marine environmental variable is one of the important factors affecting fishery resources and fishing ground for pelagic fishes.

海洋环境是影响中上层鱼类资源的重要因子之一。