新托福iBT词汇分类突破(17)

托福

sound [ ] n. 声音

post [ ] n. 杆

dowel [ ] n. 暗榫

wedge [ ] v. 楔入

underneath [ ] prep. 在……的下面

bass-bar [ ] n. 低音梁

strip [ ] n. 条

glue [ ] v. 粘合

transmission [ ] n. 传播

fasten [ ] v. 附着

suspend [ ] v. 悬挂

tuning peg [ ] [ ] n. 调音弦轴

pitch [ ] n. 音质

vibration [ ] n. 振动

draw [ ] v. 拉

bow [ ] n. 琴弓

prize [ ] v. 珍视

figuration [ ] n. 用装饰音装饰

lyrical [ ] adj. 抒情的

melody [ ] n. 曲调

pizzicato [ ] n. 拨奏乐曲

pluck [ ] v. 拨(弦)

tremolo [ ] n. 颤音

43. Photography is based on principles of light, optics, and chemistry. For the

purpose of producing a photograph, these silver salts are distributed in gelatin to make a mixture called an emulsion, which is applied to film or another supporting material in a thin layer. When the emulsion is exposed to light, the silver halide crystals undergo chemical changes and, after further processing, an image

becomes visible. The stronger the light that strikes the crystals, the denser or more opaque that part of the film becomes. Most types of film produce a

negative image, from which a positive final copy can be printed on sensitized paper. The dense (or dark) areas of the negative translate into light areas on the final photograph. Almost all modern photography relies on this

negative-to-positive process.

photography [ ] n. 摄影

principle [ ] n. 原则

optics [ ] n. 光学

silver salt [ ] [ ] n. 银盐

distribute [ ] v. (+… over)分布，散布

gelatin [ ] n. 凝胶

emulsion [ ] n. 感光乳剂

apply [ ] v. 涂，搽，撒

film [ ] n. 胶片

layer [ ] n. 垫片，层

expose [ ] v. 曝光，暴露