mechanism

n.机械装置；机构，结构

measles, measly, measurable, measurably, measure, measure against, measure up, measure up to, measured, measureless, measurement, measuring-tape, meat, meatball, meaty, Mecca, mechanic, mechanical, mechanically, mechanics, mechanistic, mechanization, mechanization, mechanisation, mechanize, mechanize, mechanise, mechanized, MEd, medal, medallion, medallist (US medalist), meddle, meddler, meddlesome, media, mediaeval, medial, medially, median, mediate, mediation,