thoughtful a.沉思的;体贴的

threaten v.威胁;是…的征兆

threshold n.入门;极限

thrill v.(使)非常激动;(使)发抖

thrive v.兴旺,繁荣

throughout prep.遍及;在整个…期间

thunder n.雷;雷声;vi.打雷;轰隆声

tick off 用几号勾出,列举

timber n.木材;原木;横木

tolerate vt.忍受