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heliotropism n.【植物;植物學】向日性,趨日性。 positive ...

heliotype

Heliotropism a form of phototropism in which flowers move to point toward the sun , tracking it as it moves across the sky 向日性:趨光性的一種類型,植物的花在一天內朝向太陽,并隨著日光照射的方向而轉移方位。