It could be a virus, or it could be all in the mind.

它可能是种病毒性疾病，也可能纯属心理作用。

柯林斯例句

Q : Is pain a cosmic fact, or purely mental?

痛苦是宇宙间的事实, 抑或完全是心理作用?

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Perhaps this is one kind of psychological process.

这也许是一种心理作用.

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The strong feeling of inadequacy described above actually comes from a sense of self - importance.

前文所描述的能力不足感,实际上来自于自大的心理作用.

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