Account:
an arrangement by which a body holds funds on behalf of aclient or supplies goods or services to them on credit
可以用英语这样解释：
An account is a structure (or an arrangement,or a scheme) which is set
up to enable an institution to hold funds for a client,or to enable a company
to supply goods or services to a customer on credit
因此
arrangement
翻译为
安排,约定,结构,契约
没有错.
希望帮到了你.