Scientists claim to have identified natural substances with cancer-combating properties.科学家们声称已经发现自然界的某些物质具有抗癌特性。The goal is complete abstention from all mind-altering substances.目标是彻底戒绝所有致幻物质。Most of these nourishing su...
But some bitter substances in It'such as elaterin are unacceptable.由于苦瓜含有苦瓜素等物质,苦味较重,令一些消费者难以接受.Stressed plants diminish osmotic potential by accumulating free amino acids, ions and dissolvable substances.被盐胁迫的植物因自由...