What needs explaining?

# get a sorted list of hash keys and store in array @temps
my @temps = sort { $a <=> $b } keys %hash;

# use a hash slice to get list of values in the same order
# as the keys in @temps and store in array @fluors
my @fluors = @hash{@temps};
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"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg

Didn't you see that he seems to be hopelessly lost doing useless things?