机译:未经训练的学生的湿地溺水避免了救生衣
fine; Life Jackets; StudentsWetlandsdomestic partnershipTeensNonprofit OrganizationstrustCambridgeshirefineLandTrustPestspartnershipsDrowning;
机译:个体落水救生机理与个体救生具的技术性能要求The Rescue Mechanism in Individual Drowning the Technical and Functional Requirements for Individual Life Preserver