What's the meaning of "home-trained"?

What's the meaning of "home-trained"?
What's the meaning of "home-trained"?

What's the meaning of "home-trained"?
楼主看看这句话就会明白的
home-trained astronaut sent into orbit by a home-made spacecraft
home-trained 由本国训练的

在职培训？
不是很清楚

国内训练

国内训练精确

意义是什么 "家- 训练”？