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different chemical groups and that the order of the groups in this sequence was fixed and repeated itself at regular intervals。 当化学元素被按照原子质量递增排列时,我们发现连续的化学元素属于不同的主族,这种顺序在一个组中是固定的,并且会定期重复出现。
3。 What we know is that as we include longer time intervals; the record shows increasing evidence of small changes in climate between different regions。 我们知道当时间间隔越长的时候,记录会显示更多的证据证明发生在不同地区的微小气候变化。
irrigate['irigeit]v。 灌溉;冲洗伤口
例句 1。 It is projected that the remaining water can support only 35 to 40 percent of the irrigated acreage by the year 2030。 按计划,到2030年,这些剩余的水只能支持35%~40%的灌溉亩数。
2。 Unfortunately; the cost of water obtained through these schemes would increase pumping costs and make the cost of irrigated agricultural products unpetitive on the national and international markets。 不幸的是,通过这些方案获得水资源的成本会使抽水的成本加大,使得灌溉农产品在国内和国际市场上都不具竞争力。
派生 irrigation(n。 灌溉)
laden['leidn]a。 载满货的;充满的;有精神负担的
例句 1。 Heavily laden wagons were widely used in the industrial regions。 在一些工业地区,重型装载火车的使用十分广泛。
2。 The water was always laden with pebbles; gravel; and sand; known as glacial outwash; that was deposited as the flow slowed down。 海水经常充满了鹅卵石、碎石和沙子,随着涨潮退去而沉积下来,这些都称做冰水沉积。
同义 filled(a。 满的)
lane[lein]n。 小路;行车道;航线
例句 It was a close…knit munity that was consisted of rectangular; one…storey mud…brick houses; and narrow lanes; which was finally abandoned about 5000 B。C。 这是一个密集型的社区,由矩形的泥砖平房以及狭窄的道路构成,但它最终在公元前5000年的时候被遗弃了。
同义 表示道路的词还有:path 路径;channel 通道;highway 公路;bypass 旁道。
moisture['m?is??r]n。 潮湿,湿气
例句 1。 The fungi absorb moisture and mineral salts from the rocks; and then pass these on in waste products that nourish algae。 菌类从岩石中吸收湿气和矿物盐,并把这些物质通过废物传递,而这些废物可以为海藻提供营养。
2。 The presence or absence of moisture is deter
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