It exists in a double stranded form where every strand is matched by its complement.

这种碱基配对存在于DNA双链中,每条单链都与其互补链,通过这个原则配对组合

耶鲁公开课 - 生物医学工程探索课程节选

When it's double stranded this gene can't be translated, because you have to have the single strand in order for the transfer RNA to bind and for this process of translation to take place.

当基因处于双链结构状态时,是不能进行翻译的,因为必须把双链拆开得到单链,才能结合转运RNA并开始翻译过程

耶鲁公开课 - 生物医学工程探索课程节选

The terms sense and antisense were coined by Paul Zamecnik to show the complementary, double-strand nature of DNA. One strand consisted of alternating patterns of the four nucleotides that make up DNA adenine, cytosine, guanine and thymine and it could be read in order.

FORBES: Antisense and Sensibility

To Dr Baselt this suggested that tiny magnetic particles might be attached to molecules using either antibodies (which will bond to proteins, sugars and so on) or single-stranded DNA (which will bond to a complementary DNA strand to form the famous double helix).

ECONOMIST: Labs on a chip

And if sense and antisense should meet, the resulting double-stranded molecule no longer works, so the protein the sense strand encodes is not made any more.

ECONOMIST: How to create lots of drugs at once