"No shrewd user" of a biologicalweapon "is going to give you that opportunity," he warned.
“没有一个精明的生物武器使用者会给你那个机会，”他警告说。
2
As outlined in that report, the most severe threat facing any transportation system is a weapon of mass destruction such as a nuclear device or a biologicalweapon.
正如报告所概括的，所有交通系统面临的最严重威胁，是大规模毁灭性武器，例如核设备或生物武器。
3
Others, including the us and Russia, argue for more research in case smallpox returns, possibly as a biologicalweapon.