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  2. Expendable launch system - Wikipedia

    en.wikipedia.org/wiki/Expendable_launch_system

    An expendable launch system (or expendable launch vehicle/ELV) is a launch vehicle that can be launched only once, ...

  3. List of English auxiliary verbs - Wikipedia

    en.wikipedia.org/.../List_of_English_auxiliary_verbs

    This is a list of English auxiliary verbs, i.e. helping verbs, which include Modal verbs and Semi-modal verbs. See also auxiliary verbs, light verbs, ...

  4. Cannon fodder - Wikipedia

    en.wikipedia.org/wiki/Cannon_fodder

    Cannon fodder is an informal, derogatory term for combatants who are regarded or treated by government or military command as expendable in the face of enemy fire. The term is generally used in situations where combatants are forced to fight against hopeless odds (with the foreknowledge that they will suffer extremely high casualties) in an effort to achieve a strategic goal; an example is the ...

  5. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    Nouns, verbs, adjectives, and adverbs are open classes – word classes that readily accept new members, such as the noun celebutante (a celebrity who frequents the fashion circles), and other similar relatively new words. [2] The rest are closed classes; for example, it is rare for a new pronoun to enter the language. Determiners ...

  6. Auxiliary verb - Wikipedia

    en.wikipedia.org/wiki/Auxiliary_verb

    An example is the verb have in the sentence I have finished my lunch. Here, the auxiliary have helps to express the perfect aspect along with the participle, finished. Some sentences contain a chain of two or more auxiliary verbs. Auxiliary verbs are also called helping verbs, helper verbs, or (verbal) auxiliaries. Research has been conducted ...

  7. Expendable (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Expendable_(disambiguation)

    "Expendable" (short story), a science fiction story by Philip K. Dick; The Expendables (2010 film), an action film by David Callaham and Sylvester Stallone; Millennium Soldier: Expendable, a video game; Expendable launch system, a type of space launch system where the first stage or tank structure of a rocket is used only once.

  8. List of English irregular verbs - Wikipedia

    en.wikipedia.org/.../List_of_English_irregular_verbs

    English irregular verbs are now a closed group, which means that newly formed verbs are always regular and do not adopt any of the irregular patterns. This list only contains verb forms which are listed in the major dictionaries as being standard usage in modern English. There are also many thousands of archaic, non-standard and dialect variants.

  9. Reusable launch vehicle - Wikipedia

    en.wikipedia.org/wiki/Reusable_launch_vehicle

    Existing examples are systems which employ winged horizontal jet-engine powered liftoff. Such aircraft can air launch expendable rockets and can because of that be considered partially reusable systems if the aircraft is thought of as the first stage of the launch vehicle. An example of this configuration is the Orbital Sciences Pegasus.