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| 1. | marine bivalve common in Philippine coastal waters characterized by a large thin flat translucent shell |
| 产于菲律宾沿海水域中普通的海生双壳类动物，有半透明的大而薄的壳。 |
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| 2. | voracious aquatic turtle with a flat flexible shell covered by a leathery skin; can inflict painful bites |
| 贪吃的水栖龟，其平展而柔软的壳外还有一层坚韧的表皮；被其咬伤的伤口会很疼。 |
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| 3. | The coiled, flat, chambered fossil shell of an extinct mollusk belonging to the class Cephalopoda, which |
| 菊石，鹦鹉螺化石已灭绝软体动物的螺旋形、扁平的化石外壳，属头足纲动物，大量存在于中生代 |
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