delta: [16] Delta was the fourth letter of the Greek alphabet, corresponding to English d. Its capital form was written in the shape of a tall triangle, and already in the ancient world the word was being applied metaphorically to the triangular deposit of sand, mud, etc which forms at the mouth of rivers (the Greek historian Herodotus, for instance, used it with reference to the mouth of the Nile). Greek acquired the word itself from some Semitic language; it is related to dāleth, the name of the fourth letter of the Hebrew alphabet.
delta (n.)
c. 1200, Greek letter shaped like a triangle, equivalent to our "D," the name from Phoenician daleth "tent door." Herodotus used it of the mouth of the Nile, and it was so used in English from 1550s; applied to other river mouths from 1790.
雙語例句
1. The less stable compounds were converted into a compound called Delta-A THC.
不太穩定的化合物被轉換成了一種叫做Delta-ATHC的化合物。
來自柯林斯例句
2. A Delta II rocket was launched from Cape Canaveral early this morning.
今天一早，一枚“德爾塔”Ⅱ型火箭在卡納維拉爾角發射升空。
來自柯林斯例句
3. Delta is the fourth letter of the Greek alphabet.
δ是希臘字母中的第四個字母.
來自《簡明英漢詞典》
4. The Nile divides at its mouth and forms a delta.
尼羅河在河口分岔,形成了一個三角洲.
來自《現代漢英綜合大詞典》
5. The singularities and inverse kinematic solution of the DELTA robot are discussed.