U 
unaccustomed 
adj.不习惯的not habituated,不平常的 not customary : not usual or common 
unbearable 
adj.无法忍受的, 承受不住的 not bearable : UNENDURABLE 
uncalled-for 
adj.不必要的, 多余的 Not required or requested. unwanted 
unquenchable 
adj.难抑制的 Impossible to slake or satisfy:, 不能消灭的 mpossible to suppress 
V 
vacillate 
v.犹豫不定 to waver in mind, will, or feeling : hesitate in choice of opinions or 
courses 
vandalism 
n.故意破坏公物,艺术的行为 willful or malicious destruction or defacement of 
public or private property 
verify 
vt.检验, , 查证to establish the truth, accuracy, or reality of 
vigorous 
adj.精力旺盛的, 有力的 possessing vigor : full of physical or mental strength or 
active force : STRONG 
vivid 
adj.生动的,逼真的having the appearance of vigorous life or freshness : LIVELY 
清晰的 producing distinct mental images