1.
neutrons per absorption
每次吸收一个中子后所放出的中子数
2.
neutrons per fission
每次裂变所放出的中子数
3.
Atoms emit and absorb light of specific wavelengths, as measured in laboratory experiments.
就如同在实验室中所测量到的，原子会放出或吸收特定波长的光。
4.
Each quantum of light is removed from the light beams by absorption.
每一个量子由于吸收作用而从光束中消失。
5.
neutrons yield per fission
每次裂变后的中子产额
6.
Each time you draw breath today, 380 molecules per million are carbon dioxide.
今日，你所吸的每一口气里，100万个分子之中，二氧化碳则占了380个。
7.
It is pointed out that in four selections gived which suits to complete the whole sentence most in every problem.
在每个问题中，指出所给的四项选择中哪一个最适合完成整个句子。
8.
SQL> CREATE MATERIALIZED VIEW mv_ emp_ pk REFRESH FAST START WITH SYSDATE NEXT SYSDATE+2 WITH PRIMARY KEY AS SELECT* FROM emp@ remote_ db; Materialized view created.
在上面的例子中，物化视图数据的第一个副本在创建时生成，以后每两天刷新一次.
9.
We can see whether any values appear more than once in the array.
可以看出数列中每一个值的出现是否多于一次。
10.
a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones.
锶的放射性同位素（原子质量数为），存在于核爆炸的原子尘中，能象钙一样被吸收到骨中。
11.
In the second case, we are tracing out the impact into the indefinite future of a single, one-short change in investment.
在后一个例子中，我们要找出简单的一次性投资变化对未来所造成的影响。
12.
D. Sometimes skill is more important than knowledge.
四、听写填空：写出你所听到的句子中所缺的单词。每个句子朗读两遍。
13.
Fluorescent destruction occurs about once for every ten interstellar ultraviolet photons absorbed.
每吸收十个星际紫外光子，就会发生一次荧光破坏过程。
14.
When an atom of U235 is split,several neutrons are set free.
一个铀235原子分裂时,释放出几个中子。
15.
One of five offspring born in a single birth.
五胞胎之一一次出生的五个孩子中的一个
16.
In the first place, the fractional decrease in neutron energy per collision is, on the average, greatest for light nuclei.
第一，平均来说原子核愈轻，每次碰撞后中子的能量损失分额就愈大。
17.
Every time you check in a document, a new version is created. The history lists all of these versions.
每次签入文档后，就创建一个新的文档版本。历史信息中列出了所有版本信息。
18.
Let us work out the time that would be taken for an atom to absorb the energy required to produce a photoelectron.
让我们求出一个原子产生一个光电子吸收所需能量应该经历的时间。