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痕迹;微量
例句 1。 In the early thirteenth century; there were new maps that made it possible to trace one's path。 在13世纪早期,就有了能够查出一个人行迹的新地图。
2。 Scientists believe that when the oceans were young; they contained only a trace of salt。 科学家们认为,海洋在刚形成的时候只含有少量的盐分。
要点 trace通常指“向上追溯”,描述的是某一时期之前的情况或发生的事情。
transition[tr?n'zi?n]n。 过渡;转变
例句 1。 The transition from forest to treeless tundra on a mountain slope is often a dramatic landscape。 在山坡上出现的从森林到荒芜苔原的转变通常是奇妙的景观。
2。 The transition to settled life has a profound impact on the family。 向稳定生活的转变对这个家庭有着深远的影响。
同义 conversion(n。 转变)
trend[trend]n。 趋势;流行 v。 倾向
搭配 economic trend 经济趋势
例句 1。 In some remote regions; the increase in desert areas is occurring largely as the result of a trend toward drier climatic conditions。 在一些边远地区,由于日趋干燥的气候条件,沙漠化在大面积扩大。
2。 Other trends and inventions had helped make it possible for Americans to vary their daily diets。 其他的趋势和发明使美国人改变其日常膳食成为了可能。
同义 tendency(n。 趋势);fashion(n。 流行)
tribal['traibl]a。 部落的;种族的
例句 The government left working people to govern themselves; much as shepherds of tribal confederacies were left alone by their leaders。 政府让劳动人民去管理他们自己,非常像部落联盟的牧羊人被他们的首领丢弃了一样。
同义 racial(a。 种族的)
tribe[traib]n。 部落,宗族
例句 Trade among merchants relied on regulation; while among tribes trade was based on personal relationships and careful character evaluation。 商人之间的贸易依赖于规则,然而在部落中人们之间的贸易基于个人关系和谨慎的性格评价。
tri
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