E

英 [iː] 美 [iː]

e is the fifth letter of the English alphabet. It is a vowel and has a long sound, similar to the "ee" in "see".

Usage:

1. Used as a letter:

E is the fifth letter of the alphabet.

2. Used as a symbol:

In mathematics, e is a constant approximately equal to 2.71828.

3. Used in abbreviations:

E can be used as an abbreviation for words such as "east" or "energy".

Example sentences:

1. The word "elephant" starts with the letter E.

单词"大象"以字母E开头。

2. The mathematical constant e is also known as Euler's number.

数学常数e也被称为欧拉数。

3. The E train will take you to Times Square.

地铁E线会带你到时代广场。

4. Please remember to turn off all electronic devices before takeoff.

请记得在起飞前关闭所有电子设备。

5. I'm running low on energy and need to take a break.

我能量不足，需要休息一下。

Synonyms and usage:

1. Fifth: This can be used instead of E when referring to its position in the alphabet.

2. Constant: This can be used instead of e when talking about its mathematical value.

3. East: This can be used instead of E when indicating direction.

4. Power: This can be used instead of energy in some contexts, such as physics or engineering.

Editor's summary:

The letter E is an important vowel in the English alphabet with a long sound similar to "ee". It has various uses, including being a letter, symbol, and abbreviation for words like east or energy. In mathematics, e is a constant known as Euler's number. Some synonyms for E include fifth, constant, east, and power.