单词 tip-tap 释义 tip-tap, n. (a.), v.|tptp|[f. tip n.2 or v.1 + tap n.2 or v.2; or reduplication of tap n.2 or v.2, with alternation of vowel (cf. zig-zag, pit-a-pat).]a. A repeated tapping or light knocking of alternating character, or the sound made b...