1. It is considered that bioclimatology is an involved subject.
有人认为,生物气候学是一门复杂的学科。

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2. It's considered that bioclimatology is an in2volved subject.
有人认为,生物气象学是一门复杂的学科。

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3. It's considered that bioclimatology is an in2volved subject.
有人认为,生物气象学是一门复杂的学科。

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