infill/ˈɪnfɪl; `ɪnfɪl/ (also infilling) n [U]1 act of filling gaps (eg in a row of buildings) 填空隙（如一排建筑物之间）.2 material used to fill a hole or gap (eg in a wall) 填充物（用以填实洞穴或空隙的, 如在墙上）.
牛津英汉双解词典