He overcame his addictions unassisted.

他在无人帮助的情况下自己戒除了毒瘾。

At other times, he'd force her to walk totally unassisted.

其他时候，他会强迫她在完全无人帮助的情况下自己行走。

...a mother who has had an unassisted delivery.

一位不要辅助而自行分娩的母亲