A: The tilde (~) is a punctuation mark with many uses. Letters originally used as abbreviations, but also used as phonetic symbols or words. Mathematically, it is a mathematical symbol representing equivalence relation. In the final use (especially in lexicography), it is sometimes used as a font size. Biochemistry means high-energy phosphate bond.

Extension:

In language, tilde is a pronunciation sound placed on letters to indicate pronunciation changes, such as nasalization.

In the polyphonic spelling of Greek, tilde is a variant of iambic symbol.

In Portuguese and some South American dialects (such as Pico), tilde marks nasalized vowels. In addition, the Guarani language of Tupi also uses the letter G.

In Spanish and other languages influenced by Spanish culture, such as Galician, Basque and Paraguayan, it is a single letter indicating a hard nasal sound (IPA [? ])。 In Spanish, it was originally written as nn.

In Estonia? It's a single letter, meaning a single vowel.

In Vietnamese, a tilde on a vowel indicates a heavy tone.

In IPA, the wavy symbol in the symbol indicates its nasalization, and the wavy symbol in the symbol indicates its soft palate. For example, the pronunciation of the French city of Lyon is [lj], and the pronunciation of "cool" in Australian English is [k? :? ]。

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