Focus on the pronunciation of bulk
English definition of “bulk”
in bulk › COMMERCE in very large amounts: buy/sell/order (sth) in bulk Wholesalers who order in bulk will receive an additional 15% discount. She'd buy clothes in bulk from Dhaka and sell them at a profit of 50 cents each. › COMMERCE stored loose, and not wrapped in separate boxes or containers: Many health food stores carry organic grains, beans, and flours in bulk.
the bulk of sth › the main or largest part of something: Advertising provides the bulk of the company’s revenue. The bulk of our employees are recruited from overseas.