专四词汇辨析题 词汇精选：particle的用法和辨析

词汇精选：particle的用法和辨析  

一、详细释义：,n.,微粒；颗粒 [C],例句：,We can see the dust particles floating in the sunlight clearly.,我们可以很清楚地看到阳光下的灰尘颗粒。,例句：,An atom is the smallest indivisible particle of matter.,原子是最小的不可分的物质微粒。,极小量,（物）粒子，质点 [C],例句：,For example, the electronic properties of semiconductors are well known and essentially independent of size for particle diameters > 10nm.,例如，众所周知半导体的电子特性与大于10nm的粒子尺寸是无关的。,例句：,Plain glass is transparent.,普通的白玻璃是透明的。,例句：,Hence we consider the knot as a particle in equilibrium whose own weight is negligible.,因此，绳结可以当作不计本身重量，处于平衡的质点来考虑。,例句：,The particle motion is elliptical retrograde in contrast to elliptical direct orbit for surface waves on water.,质点的运动是椭圆倒转，而不是象水上的面波那样的椭圆正转。,小品词 [C],例句：,Notice that they are used with a variety of preposition and particle.,注意这些词总是与各类介词及小品词连用。,例句：,The particle plays a crucial role in the sense formation and expansion in idioms.,小品词在短语动词的语义形成与伸延中起着关键作用。,二、词义辨析：,molecule,atom,particle,speck,grain,这些名词均有“粒，微粒”之意。molecule指物质中保持原物质的一切化学性质，能独立存在的最小微粒，即分子。atom指元素的最小粒子，其体积比molecule小。particle指任何物质的微粒，引申指任何小的部分。speck一般指“微点”或“微粒”，可引申指“斑点、污点”。grain通常指能为肉眼清楚看到的颗粒，比上述几个词所表“粒”的体积大。,三、相关短语：,elementary particle,n.[核]基本粒子,alpha particle,n.[核]阿尔法粒子,beta particle,n.贝塔粒子,fundamental particle,基本粒子，基本质点,heavy particle,重粒子，重质子，重子,lambda particle,拉姆达(Λ0)超子,particle accelerator,粒子加速器,particle beam,粒子束流,particle board,碎料板，颗粒板，木屑板,particle physics,粒子物理学,subatomic particle,亚原子微粒,strange particle,奇异粒子,四、参考例句：,This particle has a very small mass.,这种粒子的质量很小。,It can form stable particle suspending layer.,它可以形成稳定的悬浮层。,A dust particle weighs only a thousandth of a gramme.,一粒尘埃的重量仅有千分之一克。,An atom is the smallest indivisible particle of matter.,原子是最小的不可分的物质微粒。,In clastic sediments, particle size is an important factor.,在碎屑沉积物中，颗粒大小是个重要因素。,He called this negative elemental particle the corpuscle.,他称之为这个负基本粒子叫做微粒。,A proton is an elementary particle of matter.,质子是物质的基本粒子。,There is not a particle of truth in the statement.,这篇陈述没有一句真话。,The wave nature of the particle produces a bunching effect.,粒子的波动性质产生了成羣的效应。,A dust particle weighs only a thousandth of a gram.,一粒尘埃的重量仅有千分之一克。