1. The sunflower's heliotropism causes it to follow the sun from east to west throughout the day.
太阳花的日回转性使它在白天从东向西追随太阳。
2. The plants in the greenhouse exhibit heliotropism, bending towards the sunlight to maximize their exposure.
温室里的植物表现出日回转性，弯曲向阳光以最大程度地暴露于阳光。