6一枝适宜发送莫尔斯讯号的防水手电筒，连同一副备用电池及一个备用灯泡，放在一个防水容器内；

6one Waterproof electric torch suitable for morse sign alling together with one spare set of batteries and one spare bulb in a waterproof container;

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15一枝适宜发送穆尔斯讯号的防水手电筒，连同一副备用电池及一个备用灯泡，放在一个防水容器内；

15one Waterproof electric torch suitable for morse sign alling together with one spare set of batteries and one spare bulb in a waterproof container;

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例如，投影仪上的电灯泡坏了（而你又没有带备用的），或者你的公文包落在机场了。

What if your projector blew a light bulb (and you forgot to bring a spare) or your briefcase was lost at the airport?

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