The stadium shall undertake to ensure, so far as reasonably practicable, the safety of persons not in their employment.该体育场要在合理可行的范围内尽可能确保非雇佣人员的安全。I undertake to preserve a strictly neutral position during this debate.在这次辩论中，我保证恪守中立的立场。I undertake to perform certain privy services for him.我负责为他提供某种秘密服务。