| 词汇 | beam |
| 词根词缀 | 词源： O.E. beam originally "living tree," but by 1000 also "post, ship's timber," from W.Gmc. *baumoz (cf. O.Fris. bam "tree, gallows, beam," M.Du. boom, Ger. Baum "tree"), perhaps from PIE verb root *bu- "to grow" (see be). Meaning of "ray of light" developed in O.E., probably because it was used by Bede to render L. columna lucis, Biblical "pillar of fire." Nautical sense of "one of the horizontal transverse timbers holding a ship together" is from 1620s, hence "greatest breadth of a ship," and slang broad in the beam "wide-hipped" (of persons). The verb meaning "emit rays of light" is from mid-15c.; sense of "to smile radiantly" is from 1893; that of "to direct radio transmissions" is from 1927. To be on the beam (1941) was originally an aviator's term for "to follow the course indicated by a radio beam." Lewis Carroll may have thought he was inventing beamish in "Jabberwocky," but it is attested from 1530. 词根记忆： n. (横)梁,桁条;(光线的)束,柱v.微笑(指面带喜悦或笑容,暗示对他人的友好或内心的满足)She beamed with happiness.她高兴得眉开眼笑The football team stopped the steam stream with beams.足球队用横杆堵住了蒸汽流 |
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