你的急救工具箱必须是防水的；不过，你通常需要做的工作就是密封拉链袋里面的用品。
Your kit should be waterproof; however, sealing your supplies inside of zipper baggies is usually the job all you need to do.
越来越多具有高附加值的产品，如带有重复密封拉链的塑料袋，将会取代传统的硬质包装。
More and more high value-added products, such as plastic bags with resealable zipper, will replace the traditional rigid packaging.
你的急救工具箱还必须是防水的，尤其是当你带着它出门远行的时候；不过，你通常需要密封拉链袋里面的用品。
Your kit should be waterproof as well, particularly if you will travel with it away from home; however, sealing your supplies inside of zipper baggies is usually all you need to do the job.
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