ex·tru·sive /ɪkˈstrusɪv, zɪv/
(a.)擠出的,突出的,噴出的
Ex·tru·sive a. Geol. Forced out at the surface; as, extrusive rocks; -- contrasted with intrusive.
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extrusive
adj : of rock material; forced out while molten through cracks in
the earth's surface [ant: intrusive]