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ozone layer
This term refers specifically to the atmospheric shield protecting Earth from ultraviolet radiation. It is almost exclusively used in scientific, environmental, and educational contexts, carrying a strong connotation of fragility and ecological urgency due to the historical focus on its depletion.
Grammatically, while the word "layer" is typically countable, "ozone layer" is treated as a unique geographical and atmospheric entity. It is almost always used in the singular because Earth possesses only one such global system, making plural usage extremely rare and typically incorrect in a standard scientific context.
Ý nghĩa
Ví dụ
The ozone layer protects the earth from harmful ultraviolet radiation.
We learned about the depletion of the ozone layer in science class today.
I wonder if the ozone layer is actually recovering now.
Chlorofluorocarbons are known to damage the ozone layer.
The ozone layer acts as a shield for all living organisms on the planet.
Is the hole in the ozone layer getting smaller or larger?
Without the ozone layer, skin cancer rates would skyrocket.
The Montreal Protocol was designed to protect the ozone layer.