Note to recorder:
Please read the words at natural speed with a pause between each.
I've indicated the stress pattern for each word with figures: each figure represents a syllable: 0 = no stress, 1 primary stress, 2 secondary stress. But you probably don't need it. ;)
Don't read out loud the figures/numbers though.
Thank you!
underdevelop 20010
inconceivable 20100
extraordinary 20010
unprecedented 01020
unemployment 2010
economic 2010
organizational 200100
advantageous 20100
opportunistic 20010
legislative 1020
J'espère que cela sera utile