英语翻译deep 怎么用?

deep down
adv.
基本上,主要地
adv.
事实上,实际上,其实
例句
Deep down they’re still frustrated adolescents.
实际上他们仍然是一些胸无大志的青少年.
Deep down,she was still a rebel.
她实质上仍是个叛逆者
She seems indifferent,but deep down she's very pleased.
她貌似无动於衷,其实心里非常高兴