SICP metacircular interpreter question

How does it handle sequences in input? If it's in a define or lambda or begin or whatever then it follows those respective paths in the eval branch, all of which lead to eval-sequence. But if it's just
(define a 1) (define b 2)
how's it interpret that?

Then goes on to (define b 2) if (define a 1) completed successfully
That's what I'm wondering about. For reference, here's the relevant code.

(define (eval exp env)
  ((analyze exp) env))

(define (analyze exp)
  (cond ((self-evaluating? exp)
         (analyze-self-evaluating exp))
        ((quoted? exp) (analyze-quoted exp))
        ((variable? exp) (analyze-variable exp))
        ((assignment? exp) (analyze-assignment exp))
        ((definition? exp) (analyze-definition exp))
        ((if? exp) (analyze-if exp))
        ((lambda? exp) (analyze-lambda exp))
        ((begin? exp) (analyze-sequence (begin-actions exp)))
        ((cond? exp) (analyze (cond->if exp)))
        ((application? exp) (analyze-application exp))
        (else
         (error "Unknown expression type -- ANALYZE" exp))))