陨星

Meibom and his colleagues based their study on two rare meteorite specimens - HH 237, a grapefruit-size chondrite recovered from the Hammadah al Hamra region of north Africa; and QUE 94411, a walnut-size sample collected from the Queen Alexander mountain range in Antarctica.

梅波姆和他的同事将理论建立在对二颗稀有陨星标本的研究基础上。这二颗陨星一颗是

The silence of a falling star lights up a purple sky.

沉寂的一颗陨星点亮了一片紫色的天空。

Adding weight to the assumption of widespread homochirality is the predominance of left-handedness among amino acids found in meteorites that struck Earth.

在撞击地球的陨星上发现的氨基酸主要是左手式的，为同手性广泛存在的假设提供了支持。

For example, much information comes from the study of meteorite s

例如，对陨星的研究可以取得大量的资料。

And the extinction of the dinosaurs 6500 years ago about a large meteorite.

恐龙的灭绝和6500万年前的一颗大陨星有关。

The amazing speed and erratic motion indicated that it couldn't have been a plane or a meteorite .

惊人的速度和奇异的动向表明它不会是一架飞机或是一颗陨星。

One theory is that a huge killer meteorite hit the earth.

有种理论认为曾经有颗巨大的致命陨星坠落在地球上。

One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorite s.

地球外存在生命的理论是根据陨星上存在碳化合物这一事实得出的。

A meteorite was very close to them now.

一颗陨星正向他们逼近过来。

Meteorites, chondritic meteorites, meteorite composition, meteorite structure, impact craters,carbonaceous chondrites, glossary

关键词：陨星；球粒状陨石；陨星组成物；陨星构造；撞击弹坑；碳质陨石；术语表

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。