And we've developed this intervention that really helps adul

主句：
And 并列连词
we 主句主语
have developed 主句谓语
this intervention 主句宾语
that really helps adults center in on the things that we need 定语从句,修饰宾语this intervention
该定语从句中
that为关系代词代替先行词this intervention,并在从句中充当主语
really 从句状语
helps 从句谓语
adults 从句宾语
center on the things 宾语补足语
that we need 也是定语从句,修饰宾语补足语中的the things
其中,that代指先行词the things,在定语从句中充当need宾语
we 从句主语
need 从句谓语
再问： 就是center后面的in是错的咯，应该去掉是吗？？
再答： in/on两个介词放在一起，应该去掉in。