Ensure all material is properly packed and sent by recorded delivery.确保把所有材料包装妥当并挂号寄出。Send all letters recorded delivery if you want to be certain they will arrive.倘使你要确保信件递到无误，用记录式邮递寄发好了。I sent the package by recorded delivery.我挂号邮寄了包裹。Use recorded delivery for large cheques or money orders.对于大额的支票和汇款单要使用挂号邮寄。