[ZK1]delta ['deltE] n.
1.the fourth letter of the Greek alphabet(Δ,δ)希臘字母表的第四個(gè)字母。
2.triangular area of alluvial land at a river’s mouth, enclosed or crossed by branches of the rivers.(河口的)三角洲
the Nile Delta 尼羅河三角洲
[ZK2]wear sth. down: (causing sth to) become gradually smaller, thinner, etc.使某物逐漸變小,變細(xì),變薄等。
[ZK3]outline:
1.lines showing the shape or outer edge of sth.輪廓,外形
She could see only the outlines of the trees in the dim light. 朦朧中,她只看到樹木的輪廓。
2.statement of the main facts or points要點(diǎn),大綱,摘要
an outline of an essay/ a lecture
[ZK4]dramatic:
1.of drama.戲劇的
a dramatic society 戲劇協(xié)會
2. exciting or impressive 戲劇性的,激動人心的,給人深刻印象的
dramatic changes, development, news 激動人心的變化,發(fā)展,新聞
[ZK5]fluctuate
[;flVktSu'eiSn] n.變化,波動
wide fluctuations of temperature. 溫度的巨大變化
[ZK6]hectare['hekteE]
measure of area in the metric system, equal to 100 ares or 10000 square metres. 公頃
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