| 单词 | delta |
| 释义 | delta['deltə]n. 三角洲, 希腊字母的第四个字【医】 δ(希腊文的第四个字母), 丁种, 三角, 三角形区【经】 三角洲 delta del.ta AHD: [dµl“t…] D.J. [6delt*]K.K. [6dWlt*]n.（名词）1. The fourth letter of the Greek alphabet.See table at alphabet △，δ：希腊字母表中的第四个字母参见 alphabet2. An object shaped like a triangle.三角形物：形状象三角形的物体3. A usually triangular alluvial deposit at the mouth of a river.三角洲：河口常见的三角形沉淀淤积地带4. A similar deposit at the mouth of a tidal inlet, caused by tidal currents.三角洲：海湾入口处三角形沉淀区域，由潮汐形成5. Mathematics A finite increment in a variable.【数学】 变量增量：变量的有限增量语源:1. Middle English 中古英语 2. from Latin 源自 拉丁语 3. from Greek ; akin to Hebrew delet [door] 源自 希腊语 ；类似于 希伯来语 delet [门] 4. from Phoenician dalt 源自 腓尼基语 dalt 继承用法:delta“ic AHD: [-t³“¹k] 或 del“tic [-t¹k] （形容词）注释:A &S{D} sits at the mouth of many rivers.The Greeks, noticing the resemblance between the island formed by sediment at the mouth of a river such as the Nile and the triangular shape of their letter delta,gave the namedelta to such an island. English borrowed this sense from Greek,although the worddelta appeared first in English as the name of the letter, in a work written possibly around 1200.The sense “alluvial deposit” is not recorded until 1555,whendelta is used with reference to the Nile River delta. 位于许多河口的三角形区域。希腊人注意到河口（例如尼罗河）由泥沙沉淀生成的三角形岛屿与他们的字母&S{D}相似，因此用delta 来称呼这些岛屿。 英语取义于希腊语，但是delta 最早出现在英语里是作为△这个字母的名称， 它在书面的作品中出现大约是在1200年左右。“淤积沉淀”这个含义直到1555年才有记载，那时delta 被用于特指尼罗河口的三角洲 Delta Del.ta AHD: [dµl“t…] D.J. [6delt*]K.K. [6dWlt*]NONE（无词性）An area of the south-central United States extending on either side of the Mississippi River from Memphis, Tennessee, to Vicksburg, Mississippi. An important cotton-producing region, it is noted for its folk culture, especially as the home of the earliest blues music.密西西比三角洲：在密西西比河两岸延伸的美国中南部地区，从田纳西州的孟菲斯至密西西比州的维克斯堡。密西西比三角洲是重要的产棉区并以其民间文化闻名，尤指它是早期蓝调音乐的发源地 |
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