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31.34度化度分秒,

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31.34度化度分秒,
31.34度化度分秒,
31.34°
=31°+0.34°
=31°+(0.34×60)′
=31°+20.4′
=31°+20′+0.4′
=31°+20′+(0.4×60)″
=31°+20′+24″
=31°20′24″