但研究表明，大部分不孕症的原因是由男方或女方生殖系统的病变所引起的，心理因素很少成为原发性病因。
But research shows that most infertility is the result of physical problems in a man's or woman's reproductive system, and psychological factors are rarely the primary cause.
由于高原低气压所导致的局部低氧压引起许多生理学与神经心理学问题。
Local low oxygen pressure caused by low air pressure in the altiplano results in many physiological and neuropsychological problems.
许多年前，哲学和心理物理学研究都强调视觉感受可能是由不同的原因所引起。
For many years, philosophical and psychophysical studies emphasized that visual percepts may be of very different origin.
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