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 trampling and pulverization of the soil are the consequences of an excessive number of livestock grazing in an area。 过度放牧导致了植被减少,土地遭到践踏,并被最终彻底摧毁。

explanation[?ekspl?'nei?n]n。 解释,说明

例句 1。 Dissatisfaction with conventional explanations for dinosaur extinctions led to a surprising observation that has suggested a new hypothesis in turn。 对恐龙灭绝的传统解释的不满意使人们有了惊人的发现,而这反而暗示了一个新假说的诞生。

2。 The likely explanation is that in an area of underground freshwater underlies the island; but surface elevation increases from north to south; so that as one moves south the land surface lies increasingly higher above the water table。 可能的解释是:在一个地下淡水位于岛屿之下,但其表面高度却从北到南逐渐增加的地区,如果一直往南走,就会发现地表逐渐高过水位。

explicit[ik'splisit]a。 清楚的;直率的;直言的

例句 1。 The brain's level of physiological maturation may help these types of memories; but they are not ones that require explicit verbal descriptions。 大脑发育的成熟程度可能有助于这几种形式的记忆,但这些记忆都不需要清楚的言语描述。

2。 paring the paintings found in Spain; South Africa; and Australia; some researchers believe that the paintings found in France provide more explicit evidence of their symbolic significance。 一些研究者认为,与发现于西班牙、南非和澳大利亚的油画相比,在法国发现的油画具有更为明显的象征意义。

favorable['feiv?r?bl]a。 赞成的,同意的;有利的

例句 1。 A cooling climate led many people to leave the cold areas and crowd into climatically more favorable areas。 寒冷的气候致使很多人离开寒冷地区移居到环境更加舒适的地方。

2。 Taking into account the changing conditions of light; some species perform their visual displays only when

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