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полициклдік хош иісті көмірсутек
Organic compounds which include only carbon and hydrogen with a fused ring structure containing at least two benzene (six-sided) rings. PAHs may also contain additional fused rings that are not six-sided. The combustion of organic substances is a common source of atmospheric PAHs.
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Isolating languages tend to form their words of single morphemes (that is, of roots without affixes). They often use several short words where another ...
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