1.
A Study of Method of Photographing Weak Dust Traces on Fabrics;
纺织物上微弱灰尘痕迹拍摄方法研究
2.
Across that white forehead was no smudge, no trace of an earthly pollution-no mark of a terrestrial dishonour.
雪白的前额上没有一个污点，没有一丝灰尘之间受过污辱的痕迹--没有一点儿人间的耻辱的烙
3.
flecks of dust, soot, dandruff
灰尘的微粒、 煤炱、 头皮屑.
4.
"Clean:Free from dirt, stain, or impurities; unsoiled."
干净的:无灰尘、污迹或杂质的;未污染的.
5.
Fine grains of dust can reflect blue light, which coarse grains of dust cannot.
微粒灰尘能反射蓝光，但粗粒灰尘却不能。
6.
She seemed to have fallen asleep;the tearstains and dust on her face had congealed into several black streaks.
她像睡着了，脸上泪渍和灰尘，结成几道黑痕；
7.
On Comparison of Methods to Draw Dust Footprint by Means of Static Electricity under Several Conditions;
几种情况下的灰尘足迹静电提取方法比较
8.
fine powder, flour, dust, etc
细粉末、 精制的面粉、 微细的灰尘
9.
Here is another focus movie with a track in it. Notice all the cracks and dust around.
这是另一个带有轨迹的影片。注意周围的那些裂痕和尘埃。
10.
By the end of the day Tuesday, the sandstorm was over and everything slowly got cleaned up, though a residue remained.
到了周二夜间，沙尘暴终于过去，万物逐渐恢复了本色，但沙尘肆虐的痕迹仍然随处可见。
11.
Study on the Microstructure of Concrete Heated Trace Cooling By Water
喷水冷却对混凝土受热痕迹显微结构的影响
12.
On the Verification and Analysis of Elements of Shot Mark (local-made) through Calculous
用微积分法对非制式枪弹痕迹诸元的检验分析
13.
Use of Microfilm in the Photography of Traces for Crime Detection;
缩微胶片在刑侦痕迹检验照相中的应用
14.
Microstucture Characteristics and Key Factors Study of Cracks in Copper Wires
铜导线断裂痕迹显微组织特征及成因研究
15.
Beside a bush of gray wormwood, the footprints of an animal were clearly visible.
一丛灰白色的苦艾旁，沙地上留有一行清晰的野兽走过的痕迹。
16.
The water vapor and dust particles also serve to reflect the rays of the sun.
水蒸气及灰尘微粒也起到反射太阳光的作用。
17.
In those warm beams the motes kept dancing up and down.
只见温暖的光芒里面，微细的灰尘在上下飞扬。
18.
The Observation nd Study on the Tiny Marks on the Jades Excavated in Lingjiatan Site;
凌家滩玉器微痕迹的显微观察与研究——中国砣的发现