| 单词 | 能自由游动 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔scallop〕Any of various free-swimming marine mollusks of the family Pectinidae, having fan-shaped bivalve shells with a radiating fluted pattern.扇贝：任一种扇贝科海洋软体动物，能自由游动，生有辐射状扇状双壳美国传统〔trochophore〕The small, free-swimming, ciliated aquatic larva of various invertebrates, including certain mollusks and annelids.担轮动虫：多种水生无脊椎动物，体型很小能自由游动的、有纤毛的幼虫，包括某些软体动物和环节动物的幼虫美国传统 |
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