It should consider "the modern times" as correct
is 'moderne' pronounce mod-erne or mol-erne? When you hover over it, it is pronounce like the latter. But clicking the listen button it sounds like the first.
I suspect this is another case of Danish "soft D" sounding (to British ears, anyway) like English "dark L".
periods mean times, eras
This is one of those instances where the sentence spoken at normal speed is far easier to understand than the tortoise-paced version!
I know it's very weird (but we have many weird sentences here anyway).
Is "They modernized the periods" wrong?
If I am not mistaken it would be "De moderniserede perioderne"
the modern times