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"D" is a noun which is often translated as "la d", and "s" is a noun which is often translated as "la s". Learn more about the difference between "d" and "s" below.
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s(
ehs
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
1. (letter)
An abbreviation is the shortened form of a word or group of words (e.g., "UFO" = "unidentified flying object"; "p." = "page").
a. s
The bullet is moving at a speed of 12 m/s.La bala se desplaza a una velocidad de 12 m/s.
There are 3,600 s in 1 h.En 1 h hay 3,600 s.