单词：cotton boll
cotton boll的用法和样例：
例句
- Some cotton bolls have fallen on the ground.有些棉桃落在地上了。
- The cotton bolls burst open, revealing masses of snow-white fibres.棉桃绽裂，露出雪白的棉花。
- Boll rot has been attributed to a wide range of organisms.棉铃腐烂是由分布范围广泛的微生物引起的。
- The cotton grows on the plant as long hairs attached to the seeds inside the boll.棉花在植株上作为附着在种籽上的长茸毛在棉铃里生长发育。
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