二因素说是英国心理学家斯皮尔曼的智力结构理论。认为智力由一般因素和特殊因素构成。一般因素是完成任何活动都必备的共同因素，特殊因素是完成某种活动必备的特有因素。此理论被众多智力测试所应用，如著名的韦氏智力测试（Wechsler Intelligence Scale）、斯坦福-比奈智力测试（Stanford-Binet Intelligence Scale）以及众多的高量程智力测试。
他说课程设计是他作出选择的第二考虑因素，主要考虑因素是把自己置于那里的商业气氛里。
He says the curriculum was a secondary consideration in his choice; his top priority was immersing himself in the business climate there.
去年空间案例报告发表说空间宇宙是使人对物理学位感兴趣的第二热门因素。
Last year's Case for space report stated space was the second most popular factor motivating people to physics degrees.
虽然说自安哥拉成为撒哈拉以南非洲第二大产油地后，源源不断的石油收入或多或少地影响了物价，然而却不是导致物价高的最根本因素。
That is not primarily a consequence of the influx of oil money, although there is a lot of it about since Angola is sub-Saharan Africa's second biggest producer.
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