[xiāng shí]
(彼此认识) be acquainted with each other
									
										have never met; not be acquainted with each other
										素不相识
									
									
									
										We are the casual acquaintances of a long railway journey.
										我们是在火车长途旅行中相识的朋友。
									
									
									
										pick up an acquaintance with sb.
										(和偶然碰到的人)结为相识
									
									
									
										an old acquaintance
										老相识