- unsound theory
- 不健全: unsound; imperfect; defectiv ...
- 的: 4次方是 The fourth power of 2 i ...
- 理论: theory
- 不健全的: diseased; distempered; lacking; morbid; noxious; rotten; sorry; strabismic; u ound; undound; unfit; unsound
- 不健全的记忆力: non-sane memory
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