set out与set offIn August,1966,he( )once from England on the first leg of his voyage to Australia.括号中添set out还是set off,哪个更好一些?

set out与set off
In August,1966,he( )once from England on the first leg of his voyage to Australia.括号中添set out还是set off,哪个更好一些?

1.用set out更好.
2.set out to...动身/启程去某处
set off for...动身/启程去某处