L, L is the letter 12 in the Latin alphabet. L comes from semitic Lamed, meaning phoneme /l/, which is the same as Greek letters lambda lambda lambda (uppercase) or lambda lambda (lowercase) and Etruscan and Latin letters. In reference books, it can also be spelled el or ell. The twelfth letter of the English alphabet, capitalized as L, lowercase as L, and the International Phonetic Alphabet:/? l/，[？ ]。

English letters (26 letters): aa bb cc DD ee ff gg hh ii jjkkll mm nn oo PP QQ RR ss TT UU vv ww xx YY ZZ.

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1. In the Phoenician and Hebrew alphabets, L is called lamedh, which is a hieroglyphic symbol, indicating ox drive or whip. . The corresponding letter in Greek is λ(lambda.

2, l Morse code: ...

3.4L stands for "left" in most native English-speaking countries, such as left, left lane and left channel, which is the abbreviation of English left (antonym: right).

4. In the current futures of Dalian Futures Exchange, L is a plastic contract.

5. in geometry, l or l is used to represent length.

6. In mathematical analysis, "(L)∫" is often used to express Lebesgue integral.

7. In physics, the torque formula is M=F×L, where l is the effective length. In addition, the black body L can also represent angular momentum. The white object l stands for inductance.