What would you do if you ever found yourself lost in the wild? To find out, you can join a weekend survival course in Australia's Outback (内地的）Desert. This vast area is famous for its harsh（恶劣的） desert climate.
To survive, your first task will be to find water, a rare commodity（有价值的物品） in the desert.
Animals such as ants and seed-eating birds are strong indicators（指示物） of water. You can also cut and suck（吸入) moisture(水分） from the roots and leaves of plants. Trees like the desert oak （橡树）have roots near the surface. But be careful. The branches of gum tree （橡胶树，桉树）are a rich source of water, but the leaves are poisonous, so don't eat them.
The best place to build a shelter is in an area with the least amount of sunlight, like between sand dunes （沙丘）or in a trench（沟渠）. To make a trench, dig a hole big enough to lie down in and use the extra sand to create a barrier or wall on each side. This can help to shield you from the glare and scorching（极热的） heat of the sun.
Nights can be cold, so knowing how to make a fire is essential. One way to build a fire is to use the hand drill method. This is one of the oldest and simplest ways to start a fire. It involves rolling a stick between your hands while pressing it onto a notched (有凹口的）piece of wood with dry tinder below. The idea is to use friction to create enough heat to ignite the tinder(点燃）火种. This can be a lot of work. As for food, you'll have to be open-minded. Some forms of life can be ugly to look at but can provide you with enough protein to survive. They may even taste good, like scrambled eggs（炒鸡蛋）!
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