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e probably the first durable ornaments that we possessed。 珠子可能是我们最先拥有的耐用的装饰品。
duration[du'rei?n]n。 持续的时间
例句 1。 The middle… and upper…latitude timberlines are strongly influenced by the duration and depth of the snow cover。 中高纬度的树带界线受到积雪的覆盖时间和积雪深度的强烈影响。
2。 An animal usually maintains its own characteristic cycle duration with great precision for many days。 动物通常会将极其精准的具有自身特性的循环时间维持许多天。
dwelling['dweli?]n。 住处
例句 For people in cliff dwellings; hauling water; wood and food to their homes was hard work。 对于住在悬崖上的人们来说,把水、木材和食物运到家中是一项艰难的工作。
efficient[i'fi?nt]a。 有效的,有效率的;能胜任的
搭配 energy efficient 节能的
例句 1。 This friction tends to slow the speed of winds and make them far less efficient at dispersing on airflow。 摩擦力将会降低风速并使分散风流的效率降低。
2。 The camel's abilities to thrive in harsh desert conditions and to carry large loads cheaply made it an effective and efficient means of transportation。 骆驼能在恶劣的沙漠环境中健壮成长,而且能驮沉重的货物,这使它成为了廉价而高效的沙漠运输工具。
3。 The engine eliminated water in the mines by driving efficient pumps; so that it is possible to make deeper and deeper mining。 机车通过操纵高效的泵来排走矿井中的水,从而使采到越来越深的矿产成为可能。
要点 efficient的名词形式是efficiency,主要是指办事的“效率”,“效率高”可以说high efficiency。
同义 effective(a。 有效的)
派生 efficiently(ad。 有效地)
elite[ei'li:t]n。 精英;掌权者;社会名流;实力集团 a。 卓越的;精锐的
例句 1。 Many of the statues are made to be put in the tombs of the elite in order to serve the tomb owners in the afterlife。 许多雕像是要被放进掌权者的坟墓中的,为了在来世侍奉坟墓主人。
2。 The growing power of the elite; who controlled the economy; would not serve as additions to the labor force。 掌控经济的实力集团的权力日益强大,不再是劳动力的附属物。
3。 If you want to understand ancient Egyptian art; it is important to know as much as possible of the elite Egyptians' view of the
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