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We were unable to perceive where the problem lay.
我们察觉不出问题出在哪里。
youdao
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Humans are, however, unable to perceive magnetic fields naturally.
然而，人类并非生来就能感知磁场的存在。
youdao
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Humans are, however, unable to perceive magnetic fields naturally.
然而，人类并非生来就能感知磁场的存在。
youdao