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1.timber n.木材，木料(wood suitable for building or for carpentry)
联想记忆：timb(看作time时间)+er--树苗需要很长时间才能成材
例：cut timber伐木//Ancient settlers used mud and grass to build their homes, doing it without timber and nails.
2.tissue n．纸巾(soft paper)；【生】组织（形态上相似的细胞和相关的细胞间物质的集合，如：肌肉组织）（an aggregate of cells, usually of a particular kind together with their intercellular substance that form one of the structural materials of a plant or an animal)
例：Animals acquire carotenoids(类胡萝卜素)in many ways and then store them in a variety of tissues.
3.toll n.过路（桥）费（money paid for the use of a road, bridge, etc.）；伤亡人数，损失(loss or damage caused by sth.)；v.（缓慢而有规律地）敲(to sound with slow measured strokes)
发音记忆：“痛”--受伤了，所以痛--伤亡人数
例：Whenever bridge tolls are increased, the authority must pay a private contractor to adjust the automated toll-collecting machines.
派生词：toller(n．敲钟人；征收通行税的人)
4.tortoise n．乌龟，龟(turtle)
例：Researchers hypothesize that granitic soil is the ideal construction material for the desert tortoise.
5.toxic a．有毒的(poisonous)
词根记忆：tox(毒)+ic--有毒的
例：Among birds, social learning helps them avoid toxic substances.
派生词：nontoxic(a．无毒的)；toxicity(n．毒性)；toxication (n．中毒)
同根词：detoxify(v.解毒)
6.toxin n.毒素，毒质(a poisonous substance)
例：Wood smoke contains dangerous toxins that cause changes in human cells.
7.tract n.一片（土地）(an indefinite stretch of land)；【解】管道(a system of body parts or organs that act together to perform some functions)
例：The erosion of valuable topsoil will reduce the crop yield of a tract of land．//a vocal tract声道
8.tragedy n．惨事(misfortune)；灾难（calamity）
例：It was a tragedy that we lost the game in the last minute.
9.trait n.特征( characteristic)；特性(a distinguishing quality)
联想记忆：要根据每位队员的特点(trait)进行训练(train)
例：Special genetic traits can easily be introduced into plant strains with the use of the new techniques.//personality trait个性品质
n. 灾难，不幸事件
