- 重点词汇
- imagesn.(心目中的)形象;印象;画像;声誉;雕像;塑像;
- afterprep.…后的;（表示时间）在…以后;（表示位置、顺序）在…后面;
- relativelyadv.关系上地;相对地;比较地;较比;
- radiationn.辐射;放射物;辐射状;分散;
- aart. (用于可数名词或单数名词前，表示未曾提到的)一(人、事、物);用于前有形容词或后有短语的不可数名词前;一（个）;每一（个）;任一（个）;
- satisfactoryadj.令人满意的;合适的;
- responsen.答复;反应;
- demonstratedv.举行示威游行（或集会）( demonstrate的过去式和过去分词 );示范。展示;显示;论证;
- 相关例句
Radio astronomy has greatly increased our understanding of the universe.
辐射天文学大大地增进了我们对宇宙的了解.
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The equation was developed in 1961 by Dr. Frank Drake at the National Radio Astronomy Observatory.
1961年,美国国家无线电天文台的弗兰克·德雷克博士创造出了这个方程式.
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In none of these respects does optical astronomy have any advantage over radio astronomy.
在所有这些指标上,射电天文并不比光学天文逊色.
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The mass of one of these suppressive black holes has recently been measured using radio astronomy.
对于这些有着巨大质量的黑洞,最近可利用射电天文学来测量它们的质量.
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Radium , because of its powerful radioactive rays, can go deep into the human body.
镭因为它有强大的放射性线, 能够穿透人们的身体.
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It looked like ordinary salt, but was one million times more radioactive than uranium.
看起来它就像普通的盐, 而它的放射性却比铀要大一百万倍.
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For underwater bursts at certain depths, the radioactive cloud may not be formed.
当在水下某一深度爆炸时, 放射性云团也许不会形成.
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Honeycomb sandwich has become an important material in designing radomes instruction.
蜂窝夹层结构已成为雷达罩结构设计中广泛应用的重要材料.
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两个项目改为有天线罩, 它们可能是像SD-10一样的主动雷达 - 制导武器.
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B-RAF-siRNA inhibited BGC 823 cell prolifera-tion and induced apoptosis ( P & lt; 0.01 ).
促进胃癌BGC823细胞的凋亡 ( P & lt; 0.01 ).
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An old proverb says From rags to riches and back again in three generations.
有句古谚语这样说:“富不过三代. ”
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