be acquainted with

接触，认识

bawl, bay, bay window, bay-leaf, bayonet, bayou, bazaar, bazooka, BBC, BBFC, BC, be, be (badly) in need of, be able to, be able to do, be about to, be about to do, be absorbed in, be abundant in, be accustomed to, be addicted to, be adequate for, be affected with, be afraid, be afraid of doing sth., be afraid of sth.(sb.), be afraid to do sth., be alert to, be alike to, be alive to, be all ears, be ashamed of, be ashamed to do, be assigned to do, be associated with, be astonished at, be at ease with, be at the end, be at war, be attached to,