1.metabolize v.使新陈代谢( to subject to metabolism)
例：In virtually all types of tissue in ever}t animal species, dioxin induces the production of enzymes that are the organisms attempt to metabolize, or render harmless, chemical irritants.
同根词：metabolism(n.新陈代谢)
2.metallic a.金属的(of, relating to, or being a metal)
词根记忆：来自metal(n.金属)
例：Plate movements are the surface expressions of motions in the mantle-the thick shell of rock that lies between Earths crust and its metallic core.
同根词：metalize(v.使金属化)
3.motamorphic a．变质的;变性的(of or relating to metamorphosis)
例：According to the passage, the widely held view of Archean-age gold-quartz vein systems is that such systems were formed from metamorphic fluids.
同根词：metamorphosis(n.变形;变质)
4.metaphor n.隐喻，暗喻(a figure of speech in which a word or phrase that ordinarily designates one thing is used to designate another, thus making an implicit comparison)
词根记忆：meta(变化)+phor(常有)--以变化的方式表达--隐喻
例：The candidates speech contained many metaphors and little substance.
5.meteor n.【天】流星（a bright trail or streak that appears in the sky when a meteoroid is heated to incandescence by friction with the earths atmosphere）
例：the meteor shower流星雨
派生词：meteorite(n．陨星)
6.meteorite n．陨星，流星(a meteor that reaches the surface of the earth without being completely vaporized)
词根记忆：来自meteor(n.流星)
例：Some fullerenes have been found on the remains of a small meteorite that collided with a spacecraft.
同根词：meteoric(a．大气的：流星的)
7.meteorological a．气象学的：气象的(aerography)
词根记忆：来自meteorology(n．气象学；气象状态)
例：Mathematical models of the meteorological aftermath of such catastrophic events are beginning to be constructed.
同根词：meteorologist(n.气象学家)
8.methane n.甲烷，沼气(firedamp)
例：Natural gas is composed mostly of methane.