他们曾经大量地被捕杀，以用作肉类和油料(用于点灯和烹饪用油)的原材料，但今天海豚渔业的数量还只是有限的。
They were once widely hunted for meat and oil (used for lamps and cooking), but today only limited dolphin fishing occurs.
随着碳纤维价格大量下降，使用量不断增加，更多数量有限的芳纶和碳纤维增强材料被使用。
More limited quantities of aramid and carbon reinforcements are in use, with an increasing amount of carbon fibre as the price of such fibres has dropped sharply.
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