The "bai" and "niang" you pronounce with a ascending tone, the "zi" you pronounce with a fairly low pitch but audible enough.
Chi as in cheese then bi as in bee
Ren-Min-bi
Bitumen Bi*tu"men
ahr-bi-trah-zher
si-bi-si-fic
Mit-soo-bi-shee Mit (mittens) - soo (soon) - bi (big) - she
ar-ak-no-fo-bi-a.
It is prounounced as "wa-sa-bi", for sure. I don't why many people pronounce it as "wa-sa-be".
lo-giz-o-mech-a-no-pho-bi-a
mar-co bi-see-e-go
bee-no-kju-lar
Best way to spell the way it sounds is beh-bi.