这款果汁只含有天然成分，没有人造添加剂。

This juice contains only ___natural ingredients, no artificial additives.

蜂蜜是一种天然物质，具有许多健康益处。

Honey is a ___natural substance with many health benefits.

森林里的那棵老树因为自然原因倒下了。

The old tree in the forest fell over due to ___natural causes.