So tired was she that she fell asleep the moment she sat down. この英文の意味は？

Q So tired was she that she fell asleep the moment she sat down. この英文の意味は？

そー たいあど わず しー ざっと しー ふぇる あすりーぷ ざ もーめんと しー さっと だうん。このえいぶんのいみは？