We have a new homework about testing new materials.
The special material is called Polly. The chinese name is 保麗膠.
It's used in making a model that can put any thing into.
But as we pour polly into any containers we should open the door to keep the air
flowing. Because this material is noxious as we add some hardener into and
make them blended.
So we should take care for fear that we are affected by poison.
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