| 单词 | 花粉管 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔micropyle〕Botany A minute opening in the ovule of a seed plant through which the pollen tube usually enters.【植物学】 珠孔：种子植物胚珠上的小开口，通常花粉管由此进入胚珠美国传统〔pollen tube〕The slender tube formed by the pollen grain that penetrates an ovule and releases the male gametes.花粉管：由穿透胚珠并释放出雄性配子的花粉粒形成的细管美国传统 |
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