我真心无法在没有你支持的情况下完成这个项目。

___Truly I could not have accomplished this project without your support.

她真心相信同理心可以改变世界。

She ___truly believes that compassion can change the world.

我为这次误会以及可能造成的任何不便，真诚致歉。

I ___truly apologize for the misunderstanding and any inconvenience it may have caused.