Definition: Translate the given Spanish text to English

Positive Example 1 -
Input: A method for converting a series of m-bit information words to a modulated signal is described.
Output: Se describe un método para convertir una serie de palabras de informacion de bits m a una señal modulada.

Positive Example 2 -
Input: A last plastic cover is applied as a final protection.
Output: La presente invencion comprende un nuevo mezclador termocinetico.

Negative Example 1 -
Input: Luminescent optical sensor.
Output: SENSOR OPTICO LUMINISCENTE.

Negative Example 2 -
Input: The urinal is similar to a common toilet.
Output: El común es similar a un inodoro orinal.

Now complete the following example -
Input: The modified NK cells of the present invention are non-immunogenic, meaning that they are able to be administered to any recipient subject without being rejected by the host immune system (they are "universal").
Output: Las células NK modificadas de la presente invención son no inmunogénicas, lo que significa que son capaces de administrarse a cualquier sujeto receptor sin ser rechazadas por el sistema inmune del anfitrión (son "universales").