托福口語(yǔ)task6話題范例：Explain

Listening Part:

When we humans walk from place to place, we move on the Earth’s surface, across the Earth’s surface. Many animals of course do the same thing. Horses and dogs and cows and so on, all move on the surface, across the surface of the Earth. There are also, there are quite a few animals that have the ability to move from place to place underground, beneath the Earth’s surface. This moving around underground is called subsurface locomotion. Sub surface location has a number of benefits.
One benefit of subsurface locomotion is that it enables animals to minimize their exposure to extreme temperatures. This is very helpful to animals that live in areas with harsh climates, where it could be very dangerous to spend large amounts of time on the surface. For example, in the Sahara Desert, in Africa, there’s a type of lizard that’s able to move beneath the surface, through the sand, very quickly. Because this lizard can move so easily and so quickly underground, it doesn’t have to travel on the surface, where it would be exposed to dangerously high temperatures.
Another benefit of subsurface locomotion is that it can help animals capture prey. That’s because animals on the surface can’t see predators approaching underground. Our lizard in the Sahara Desert is again, a good example. The way it works is, when an insect is walking nearby on the surface, it produces very subtle vibrations in the sand. When the lizard senses these vibrations, it moves very quickly. Underground, where it can’t be seen, toward the source of the vibrations. It then pops up directly under the insect and catches it by surprise.

Question:

Using the example of the lizard form the lecture, explain two benefits of subsurface locomotion.

Listening keys:

總括：
Subsurface locomotion –animals move beneath earth, benefits
觀點(diǎn)1：
Enable animals minimize exposure to extreme temperature, avoid harsh climate.
例子1：
Saharan desert lizard, quickly, not on surface with high tempt
觀點(diǎn)2：
Capture prey, cuz animals on surface can’t see them
例子2：
Saharan Lizard, insect walk and produce vibration ,lizard sense ,move quickly, catch by surprise

Sample Answer:

Subsurface locomotion is the ability than animals can move beneath earth and it has two benefits .one benefit is that it enables animals to minimize exposure to extreme temperature, avoid harsh climate. Like the Saharan desert lizard because it could move quickly and doesn’t walk on surface it avoided the high temperature. The other benefit is it helps animals capture prey because animals on surface can’t see them. Still like Saharan Lizard sense vibration produced by insects walking in sand, the lizard could move quickly to them and catch them by surprise.

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