hm, then pacman is right, those are usually executed as hammer-on / pull-off. picking each note will result in a strange phrasing that will not sound as good in most situations.
an exercise:
1st finger hammer-on to 2nd finger, pull-off to 1st finger.
same with 1st to 3rd finger, 1st to 4th.
then 2nd to 3rd... etc. through all the permutations.
if you really want to, do all that with fingering each note.
also sorry to do it again, but the explanation "3trills = 2 - 16ths"
was a bit cryptic for me...
these are triplets:
http://www.billrotelladrumbeatings.com/triplet.htm