单词：geotropically
geotropism的用法和样例：
例句
- The main stems of a plant show negative geotropism as they grow upwards.植物茎往上长时表现出负向地性。
词汇搭配
- transverse geotropism横向地性
- negative geotropism负向地性,背地性...
- positive geotropism正向地性
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