1. Arrange an auxiliary cooking and heating source that can be used outside. One alternative is a portable camp stove with small cans of gas.
    放置一个备用的户外烹调和取暖用具，或者准备一个便携式露营灶和几小罐煤气。

2. Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
    如果有相配的电压，可以煮少量水的便携式热水装置是有用的。

3. I bought my son a portable typewriter.
    我给儿子买了一台手提式打字机。