There was once a gifted marksman.

曾经有一个天才射手。

My father was an expert marksman.

我父亲曾是个神枪手。

He is noted as a marksman.

他以神枪手著称。

A best marksman may miss.

最好的射手也有失误的时候。

A good marksman may miss.

好射手也有失手的时候。