美国ARCO权威托福参考词汇:U字头

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