There are some causes for it, such as less stress from department heads, insufficient fund for running a journal, enormous examining and proofreading work for editing staff, etc.
2
在一封写给法官的信中,内勒承认他是一个吸毒者。
Naylor acknowledged, in a letter to the judge, that he was a drug addict.
《柯林斯英汉双解大词典》
3
老板会在一到两周内给你寄一封信。
A letter will be sent to you by the boss in one or two weeks.