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1.therapy n．治疗，疗法(treatment)
词根记忆：therap(照看，治疗)+y--治疗方法--疗法
例：physical therapy物理疗法
派生词：therapeutic(a．治疗的)
2.thereafter ad.此后(after that)
分拆记忆：there(那)+after(后来)--那之后--此后
例：lt rained until 8:30, and it snowed thereafter.
3.thermal a．热的，热量的(of, relating to, or caused by heat)
词根记忆：therm(=thermo热)+al--热的
例：thermal gradient热梯度（温度随距离的变化率）
4.thermostat n.恒温器，自动调温器(a similar device for actuating fire alarms or for controlling automatic sprinklers);v．为…配备恒温器；用恒温器控制(to provide with or control the temperature of by a thermostat)
词根记忆：thermo(热的)+stat(站，立)--一直保持热着的东西--恒温器
例：Although ice particles in the upper atmosphere benefit Earth, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons.
派生词：thermostatic(a．恒温的；自动调节温度的)
5.threaten v.威胁(to utter threats against)
词根记忆：来自threat(n.威胁：凶兆)
例：The ruffe is one of several nonnative species in the Great Lakes whose existence threatens the survival of lake whitefish populations there.
派生词：threatened(a．受到威胁的)
6.threshold n.门槛(sill)；开端，起点(outset)
联想记忆：thres+hold(拥有)--以现有的出发--开端
例：The year 2000 is the threshold of a new millennium.
7.thrive v．兴旺(to prosper)；茁壮生长(to grow vigorously)
联想记忆：th+rive(看作river河流)--许多大河都是文明的发源地--兴旺
例：Plankton（浮游生物）generally thrive in areas with sufficient nitrogen compounds.
8.throne n.王位；王权(sovereignty)
联想记忆：thr(看作the)+one--唯我独尊--王权
例：The present queen took the throne when her father died.
9.tile n.瓦片：瓷砖(a flat or curved piece of fired clay, stone or concrete used especially for roofs, floors, or walls and often for ornamental work)；v.铺瓦（或瓷砖）于( to install tile in)
联想记忆：秘密文件( file)藏在瓦(tile)下
例：The entire building was covered with tile.//The worker tiled the kitchen floor in one day.
vi. 兴旺，繁荣，茁壮成长
