研究表明：在受感染的雌性沃尔·巴克氏体中卵的总数量高出在未受感染的果蝇中观察到的3.5倍。
"The total number of eggs laid per Wolbachia-infected female was 3.5 times higher than that observed in non-infected flies," says the study.
研究人员观察了受测者的饮食习惯和体重。
Anyway the researchers monitored the participants' weight and eating habits.
方法通过石油沥青急性经口毒性、亚慢性吸入毒性及遗传毒性的实验研究，观察在该实验条件下，石油沥青对受试动物的影响。
Methods Acute oral toxicity test, subchronic inhalation toxicity test and mutagenicity test were conducted to observe the effects of petroleum asphalt in experimental animals.
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