阳光和阴影突出了奥卡万戈河独木舟上的布西曼族人。
Sunlight and shadows highlight a river Bushman in a canoe in the Okavango River.
障碍物轮廓线与太阳轨迹的交点说明阳光和阴影之间的转换次数。
The intersection of the obstructions' outlines and the solar trajectories indicate times of transition between sunlight and shade.
说完，它便借着阳光和阴影，慢慢地改变自己的肤色。于是它渐渐地在树干上隐没了。
Having said so, it gradually changed its skin color via light and shadow, and little by little it immerged on the trunk.
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