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Instead of conveying oxygen by way of blood , insects provide or direct aeration of their tissues .
昆虫通过组细直接通风来代替血液运输氧气。
youdao
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Instead of conveying oxygen by way of blood , insects provide or direct aeration of their tissues .
昆虫通过组细直接通风来代替血液运输氧气。
youdao