Thomas and Chess identified nine dimensions of temperament: activity level, regularity, approach, adaptability, intensity, sensory threshold, mood, distractibility and persistence.

托马斯和切斯确定了气质的九个维度：活动水、性、趋性、适应性、强度、感觉阈值、情绪、注意力分散和持久性。

In other words, how did phototropism come to be?

换句话说，光趋性是如何形成的？

The two plant ones we'll talking about are phototropism and then photoperiodism.

我们要讨论的两种植是光趋性和光周期性。

And so let's start with phototropism.

让我们从光趋性开始讲起。

Phototropism is growing in response to light.

光趋性是指植向着光源方向生长的特性。

Rothbart explored other temperamental dimensions such as soothability and fear, as well as redefining the dimension of 'approach' as a baby's positive excitement and rapid advance toward new situations.

罗斯巴特探索了其他情绪维度，如安抚性和恐惧，并重新定义了“趋性”维度，即婴儿对新情况积极兴奋和快速推进的倾向度。