Low iron levels in the blood can cause severe fatigue.

血液中铁含量低会导致严重的疲劳。

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Severe fatigue.

严重的疲劳。

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And low iron levels in blood can cause severe fatigue.

血液中铁含量低会引发极度疲劳。

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Is aging, fatigue, severe and even affect the vision.

显得衰老、疲惫，严重的甚至影响视力。

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Is aging, fatigue, severe and even affect the vision.

显得衰老、疲惫，严重的甚至影响视力。

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