叶互生，通常单叶，具叶柄；叶片边缘全缘或有时具圆齿。
Leaves alternate, usually simple, petiolate; leaf blade margin entire or sometimes crenate.
这样可以使叶片边缘避免受到正午阳光的直接照射，同时在早晚还可以充分利用东西方向较弱的光线。
Such plants thus avoid receiving the strong midday rays of the sun directly on the leaf blades, but are positioned to use fully the weaker rays of the morning and evening sun from the east and west.
比如当画面上的树叶在亮色天空背景下摇曳时，叶片的边缘部分会出现光点。
For example, when tree leaves are blowing in the wind, the leaves may appear to artificially shimmer at the edges of the leaves.
应用推荐