Documentary English

MARS: Inside SpaceX

merlina small dark falcon that hunts small birds, found throughout most of Eurasia and much of North America. شاهین
interplanetarysituated or traveling between planets.
propellanta thing or substance that causes something to move or be driven forward or outward, in particular.
extrapolateextend the application of (a method or conclusion, especially one based on statistics) to an unknown situation by assuming that existing trends will continue or similar methods will be applicable.
gangwaya raised platform or walkway providing a passage.
tractan area of indefinite extent, typically a large one.

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