Historians use a wide range of primary and secondary sources for their research.
历史学家在研究中使用大量的原始资料和二手资料。
A second approach is to use a wide range of sequential frequencies; this is easier to match but more prone to interference.
第二种方法是使用一种有序的多波段发生器,这样可以更容易的匹配回波信号,但同时也更易受到干扰。
Employers use a wide range of tests meant to assess skills, intelligence, personality and honesty. And the use of biographical surveys similar to Google's new system is on the rise.
许多企业都通过内容广泛的测试了解申请人的技能、智商、个性以及诚信度,而且采用与谷歌类似的自传式调查的雇主也在增加。
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