Each messenger is an edited copy of one strand of the DNA double helix.

每个信使都是DNA双螺旋中一个单链的复制品。

youdao

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