dangerous gas造句怎么写
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Workers in chemical factories breathe in dangerous gases every day
Could a dangerous gas buildup at the bottom of the ocean bubble up and wipe out most life on Earth?
By inserting long tubes down to the lake bottom, the gas-filled water siphons up to the surface, venting the dangerous gas.
In 1984 there was a serious accident at a factory in India and a cloud of dangerous gas covered the town of Bhopal.
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