翻译过来好像没有“解释力度”的意思呢？

问题如下：

A major disadvantage of APT is that the theory gives no insights into what the macroeconomic factors might be.

选项：

A.

True

B.

False

解释：

True

These factors may include indices on stocks, bonds, and commodities, as well as macroeconomic factors. However, the model does not say which of these factors adds to the explanatory power of the relationship.

中文解析：这些因素可能包括股票、债券和大宗商品指数，以及宏观经济因素。然而，该模型并没有说明这些因素中哪一个增加了模型的解释力度。本题选A。