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1.tribal a．部落的，宗族的(of, relating to, or characteristic of a tribe)
词根记忆：来自tribe(n．部落)
例：He became skilled in several tribal lingoes.
2.tribute n.礼物，贡品（a gift showing respect, gratitude, or affection）
词根记忆：tribut(给予)+e--给皇帝的东西--贡品
例：The British colonists collected tributes from the native population.
同根词：contribute(v.捐献，贡献)；distribute(v.分配，分发)
3.trigger n．扳机(the part of the action moved by the finger to fire a gun);v.引发，导致(to initiate or set off)
联想记忆：扣动扳机( trigger)射杀了一只老虎(tiger)
例：You can't pull the trigger if the safety is locked.//Sometimes large budget deficits can trigger declines in currency value.
4.triple v.三倍于(to become three times as great or as numerous);n．三个一组(a combination, group, or series of three)
词根记忆：tri(三)+ple--三倍于
例：Annual sales of mechanical pencils are expected to triple over the next five years.//triple-trailer truck配有三个拖车的卡车
5.tri state a．三州（间地区）的(of, relating to, or consisting of three adjoining states)
例：the tri state region三州的邻接地区
6.triumph n.胜利，成功(a notable success)；欢欣(the joy or exultation of victory or success)
联想记忆：胜利( triumph)之后吹喇叭(trump)
例：return home in triumph凯旋
7.trivial a．琐屑的，微不足道的（of little importance）
词根记忆：tri(三)+vial--一分为三--琐屑的
例：it is simply too trivial to merit their attention.
派生词：triviality(n．琐事)
8.tropical a．热带的(of, relating to, occurring ln，or suitable for use in the tropics)
例：Less than 50 percent of a certain tropical country's wildlands remain intact.
派生词：subtropical(a.亚热带的)；neotropical (a.新热带区的)
9.trout n．鲑鱼(any of various salmonid food and sport fishes that are mostly smaller than the typical salmons and are anadromous or restricted to cool clear freshwater)
例：For the next couple of years, steelhead trout returning from the sea to spawn were forced to find alternative streams.
adj. 合适的，适宜的
adv. 合适
