good at 擅长…
Recognized leaders are usually good at public speaking.
有经验的领导者通常善于公众演讲。
You and you child are getting good at this together.
你和你的孩子在这点上会越来越好。

sad excuse 可悲的借口
I think that in your sad excuse for a life.
我想这是你可悲的借口。
A sad state of affairs; a sad excuse.
糟糕的事态；令人遗憾的借口。