sql,multiple join,outer join issue

example sql:

 
select a.a1,b.b1,c.c1,d.d1,e.e1 
from a 
left outer join b on a.x=b.x
left outer join c on b.y=c.y
left outer join d on d.z=a.z
inner join a.t=e.t

I know how single outer or inner join works in sql.
But I don't really understand when there are multiple of them.
can somebody explain it .
It is better to give a equivalent sql .

Thank you!