... B}.We postpone the proof of this theorem to the next section.3. The Proof of Main Theorem To show the Main Theorem, we need some more lemmas.Lemma 3.1. Let f ∈APR,thenσbfi2n,σbfi2n1,σbh2n,σbh2n1 ... expressions of x2n,x2n1,y2n,ωt, and xt are important in the process of studying the spectrum containment of the almost periodic solution of 1.1. Before giving the main theorem, we list the ... convenience to study the spectrumcontainment of almost periodic solution of 1.1. Now, we are in the position to show the Main Theorem. The proof of Main TheoremSince H1 is satisfied, by Lemma...