Personally, I pronounce it: l'-BO-ra-tree. But it is a case of personal preference. If you're used to saying "lab", then you'd say "LAB-ra-TAW-ree". There's no single answer to this. You could compare it to how you pronounce similar patterns like "observatory" and "conservatory" (conserve-a-tree?). This way your style will remain consistent.

www.wordreference.com... Or ask your native italki contacts to send you a voice message if they cannot use skype or msn calls so often.

When a dictionary says there are three different pronunciations, it is usually correct. In the case of "laboratory", yes, there are multiple pronunciations depending on the form of English being spoken. If this gives you problems, you can always just use the shortened form "lab", for which there is only one pronunciation.

It depends on where you are at. Some would pronounce it "luh-bor-uh-tor-y". I live in the Southern USA so I would say "Lab-ruh-tory". The British pronunciation is slightly different also. Any of these ways you choose to pronounce it will be understood.

hi....i think all of them are right, different place use different pronunciations,just like in china different place,people speak in different ways! 英[ləˈbɔrətəri] 美[ˈlæbrəˌtɔri, -ˌtori] good luck!