Arch vs Łódź

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An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof.

Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.

Source: Wikipedia

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The Vietnamese alphabet (Vietnamese chu Quoc Ngu, script for the national language) uses the modern Latin writing script. It uses the Latin script that was originally created by Francisco de Pina, a Portuguese missionary. The Vietnamese alphabet has 29 letters. Five additional diacritics are used to indicate tone (as in a), a), a), a and a.

Complex vowels and numerous letters with diacritics can stack twice on one letter, such as e.g. The complex vowel system and the large number of letters with diacritics, which can even stack twice on the same letter (e.g. Diacritics are used to produce a precise sound transcription of tonal languages.

Source: Wikipedia