This work adds to the idea of a general fitness factor, f, that is similar in concept to g—and of which g is one manifestation.
这次的研究让一个大体的健康因素f（与g相类似的概念）的想法更加成熟——而且g只是对f的一种表现。
2
Instead the gfactor regulates the rate of learning: it greatly affects the rate of return in knowledge to instruction and experience but cannot substitute for either.
This paper presents the application of wear particle analysis to the study of the effect of a particular factor (e. g. ionitriding temperature) on bearing failure.