By nature: essentially or innately (天生就有地); as a result of inborn or inherent (遗传的) qualities; The very essence of something that is the truest answer to it. As in I don’t think she is a vicious person by nature—growing up in an abusive household just took a toll on her.
中文释义：天生的、生来、生性、本性上、就其本性而言; 用法上要和in nature区分开来。in nature意思是性质上，实质上；到底（加强语气）。例句：She is generous by nature. （她生性慷慨。）One can’t do everything by oneself. It isn’t in nature. （你不能什么都自己来，这是不切实际的。）