1. The lipotropism of the plant is evident as its leaves exhibit a strong tendency to grow towards the light.

这种植物的唇向生长性非常明显，它的叶子呈现出强烈的朝向光线生长的倾向。

2. Lipotropism refers to the growth response of an organism, especially a plant, towards or away from light.

唇向生长性指的是一个生物，特别是植物对光的生长反应，可以是朝向光线生长或远离光线生长。