1、by oneself (用作副词)(1) 独自一人(= alone),例如:She used to sit by herself and read.她从前常常独自坐着看书.(2) 独立地,单独地,自动地,如:He finished it by himself.他独立完成那件事.2、on one's own:独自地,主动地,靠自己自食其力例如:Obstinately bent on having one's own way:固执的,任性的。