by choice
出于自愿
例句与用法：
He has grown interested in graphic education first by force of circumstance but later by choice.
开始由于形势所迫，但后来出于自己的选择，他逐渐对书画教育感兴趣起来。
出于自择
He is a mechanic by profession, and a painter, by choice.
从职业上说, 他是机械师, 从爱好上说, 他是画家。
by choice
出于自愿
例句与用法：
He has grown interested in graphic education first by force of circumstance but later by choice.
开始由于形势所迫，但后来出于自己的选择，他逐渐对书画教育感兴趣起来。
出于自择
He is a mechanic by profession, and a painter, by choice.
从职业上说, 他是机械师, 从爱好上说, 他是画家。