It emerged that EMI is considering selling its Abbey Road studios in London,used by many top bands and orchestras and immortalised by the Beatles.EMI was bought out by Terra Firma Capital Partners in 2007.The private-equity firm has since struggled with its investment and needs to raise funds to avoid defaulting on a bank loan backed by EMI.What does "back"(v.) mean here?同意偿付?由……作为抵押?“根据意思，意思应该是 ‘拖欠的（钱）’ ”那就是EMI同意偿付的钱咯？：）
问题描述：
It emerged that EMI is considering selling its Abbey Road studios in London,used by many top bands and orchestras and immortalised by the Beatles.EMI was bought out by Terra Firma Capital Partners in 2007.The private-equity firm has since struggled with its investment and needs to raise funds to avoid defaulting on a bank loan backed by EMI.
What does "back"(v.) mean here?同意偿付?由……作为抵押?
“根据意思，意思应该是 ‘拖欠的（钱）’ ”
那就是EMI同意偿付的钱咯？：）
答
backed by 是一个固定词组 意思是 依靠；在…支持/掩护/配合下
答
根据意思,意思应该是 “拖欠的（钱）”