她拒绝了邀请——首先，她有家庭义务。

She declined the invitation - she has family obligations ___for ___a ___start.

这个项目首先培养独立性。

The program fosters independence ___for ___a ___start.

首先，提案缺乏足够的细节。

___For ___a ___start, the proposal lacks sufficient detail.