| 单词 | 珠孔 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔chalaza〕Botany The region of an ovule that is opposite the micropyle, where the integuments and nucellus are joined.【植物学】 合点：珠孔对面的胚珠内结合珠被和珠心的一个区域美国传统〔knot〕Push through the hole in the beads, and tie a knot at both ends.从珠孔穿出, 并在两端打结。外研社新世纪〔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〔orthotropous〕Growing straight, so that the micropyle is at the end opposite the stalk. Used of an ovule.直生的：直立生长以至珠孔在茎的另一端的。用于形容胚珠美国传统 |
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