... incidence发生率 thorn刺；荆棘；带刺小灌木 wrinkle皱纹 ...
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黑莓一种灌木悬钩子属，通常有带刺茎干，复合叶和小核果的。
Any of various shrubs of the genus Rubus, having usually prickly stems, compound leaves, and an aggregate fruit of small drupelets.
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