?1. delta是指希臘字母中的第四個字母，音標為/dlt/。它也可以用作名詞，表示一個三角形或者河流的三角洲。

2. delta的用法和例句讀音讀法：Delta is the fourth letter of the Greek alphabet, pronounced /dlt/. It can also be used as a noun, meaning a triangular or fan-shaped deposit at the mouth of a river.

3. delta的用法和例句的用例：

- The Nile River has one of the largest deltas in the world.

- The Mississippi River delta is constantly changing due to erosion and sedimentation.

- The pilot pointed out the delta of the Ganges River as we flew over it.

- The triangle on this map represents the delta region of this country.

- The scientists studied the formation of deltas in different types of rivers.

4. delta的用法和例句組詞：

- Deltaic (adj.) - relating to or characteristic of a delta

- Deltoid (n.) - a large triangular muscle in the shoulder

- Delta-wing (n.) - an aircraft with wings that are shaped like a triangle

- Deltacism (n.) - excessive use of the word "delta"

5. delta是什么意思？delta的用法和例句的中英文對照：

中文：Delta是希臘字母中的第四個字母，也可以表示三角形或者河流三角洲。

英文：Delta is the fourth letter of the Greek alphabet, and can also mean a triangular or fan-shaped deposit at the mouth of a river.

6. 總結：Delta是希臘字母中的一個字母，也可以用作名詞表示三角形或者河流三角洲。它的讀音為/dlt/，并且可以衍生出多種形容詞和名詞。在地理學和航空領域，delta被廣泛使用來描述河流和飛機的特征。通過對delta的用法和例句進行編輯，可以幫助讀者更好地理解這個詞的含義，并且提供了多種不同的表達方式來增加語言的豐富性。