助听器的安装和调整 Fitting and adjustment of hearing aid
植入性听力装置的调整和管理 Adjustment and management of implanted hearing device
带着三明治、听装的可口可乐或在海滩上生火，做汉堡包。
They take sandwiches and cans of Coca Cola or they make a fire and cook hamburgers on the beach.
准备足够72小时之用的听装食品或脱水食品、奶粉，以及听装果汁。
Have a sufficient supply of canned or dehydrated food, powdered milk, and canned juices for at least 72 hours.
收益也不是一成不变的 ：对于易腐烂商品来说，买一送一或买二送一的交易没有听装食品来着实惠。
The benefits vary: BOGOF or three-for-the-price-of-two deals are less valuable for perishable foods than for tinned goods.
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