Objective to study the species distribution on mosquitoes, midges and horseflies of important blood-sucking diptera insect in Heilongjiang river valley.
目的调查黑龙江流域重要吸血双翅目昆虫蚊、蠓、虻的种类分布。
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It flies nineteen million times faster than the best race—horse; and yet electricity is quicker still.