对...负责的英文意思

be responsable to sb.

假如是公司里边 销售代表对经理负责 一般用短语 report to
The sales representative reports to the manager.
假如是单纯的对。。。负责，就可以用 be responsible for...短语

be responsible to sb. for sth.

duty
in charge of

answer for

in charge of