151. The trouble is that it is extremely difficult to be sure about radiation damage — a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形) children or even grandchildren.

151、问题是很难明确辐射的伤害—一个人可能感觉良好，但他（她）的性器官细胞可能受到损伤，而且有些直到生下畸形儿甚至是畸形孙儿才会被发现。

152. In the end , only 7 out of 19 regular Cola drinkers correctly identified their brand of choice in all for trails. The diet-Cola drinkers did a little worse — only 7 of 27 identified all four sample correctly.

152、最后，只有7/19的传统可乐爱好者正确地辨别出了他们的品牌，而低糖可乐爱好者水平更差—只有7/27的人辩出了四种混合的品牌。

153. Taste is such a subjective matter that we don't usually conduct preference tests for food.

153、口味是个非常主观的问题，所以对于食物我们一般不进行偏好测试。

154. It seems simple enough to distinguish between the organism and the surrounding environment and to separate forces acting on an organism into those that are internal and biological and those that are external and environmental.

154、区分周围的环境或者有机物体，以及分辨作用于有机物的影响力是生物内部的还是来自于外部环境的，看起来非常简单。

155. But in actual practice this system breaks down in many ways, because the organism and the environment are constantly interacting so that the environment is modified by the orgainism and vice versa (反之亦然).

155、但是在实际中这套系统在很多方面失败了，因为有机物和环境在不断相互作用，所以环境在不断被有机物修改，反过来也是一样。