元素 的中文句子和英文句子

补集对任意一个集合，这个集合的所有元素不共存在于它的任一子集合

For a universal set, the set of all elements in the set that are not in a specified subset.


对记录而言，程序定义的数据分层次序。结构内的元素的格式可能彼此不同，而一个数组中的元素的格式必须相同。

A program-defined hierarchical ordering of data for a record. Elements within a structure may be formatted differently from each other, whereas elements in an array must all have the same format.


这两种元素已经化学合成.

The two elements are synthesized by a chemical process.


放射性元素自然产生或人为制造的放射性元素

A naturally occurring or artificially produced radioactive element.


属，族元素周期表上的一栏

A column in the periodic table of the elements.


1810年以前还没有认出硫是一种元素。

Sulphur was not identified as an element until1810.


镭和铀是放射性元素.

Radium and uranium are radioactive elements.


现在周期表包括人类已知的全部元素，这些元素按适当的顺序排列起来。

The periodic table now contains all the elements known to man arranged in their proper sequence.


惰性的与其它元素反应不活泼的；不能形成或很少能形成化合物的

Not readily reactive with other elements; forming few or no chemical compounds.


长音节的拆分或替换一个韵律元素替代另一个，尤指在数量韵文中用两个短音节替代一个长音节

The substitution of one metrical unit for another, especially the substitution of two short syllables for one long syllable in quantitative verse.