infill

(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）.

infer, inferable, inference, inferential, inferentially, inferior, inferiority, inferiority complex, infernal, infernally, inferno, infertile, infertility, infest, infestation, infidel, infidelity, infield, infielder, infighting, infiltrate, infiltration, infiltrator, infinite, infinitely, infinitesimal, infinitesimally, infinitive, infinitude, infinity, infirm, infirmary, infirmity, inflame, inflamed, inflammability, inflammable, inflammation, inflammatory, inflatable,