“家庭环境”就可直译成 home environment。比如：

Your child needs a happy home environment. 你的孩子需要一个幸福的家庭环境。

Children need the security of a stable home environment. 儿童需要稳定安全的家庭环境。

An unhappy home environment can affect a child's behaviour. 不愉快的家庭环境能影响儿童的行为。

Her home environment is less than ideal for doing homework. 她的家庭环境对她做作业不是太理想。

有时也说 family environment。如：

A loving family environment gives children that sense of stability and permanence which they need. 充满爱的家庭环境会为孩子带来他们所需的稳定感和安定感。