上周四，当美国军事网络防御专业人士在马里兰州举行年度行业会议时，多位美国高级指挥官发出直言不讳的警告，称今年的持续行动使美国在网络空间失去了大量长期积累的优势。
As America's military cyberdefence professionals met for their annual trade meeting in Maryland last Thursday, several top US commanders issued a blunt warning that sustained operations this year had cost the US much of its long-built-up advantages in cyberspace.