1·The dog has fleas.
这条狗有跳蚤。
—— 《牛津词典》
2·You have rats, snakes, mice and fleas.
你有大老鼠、蛇、鼠和跳蚤。
3·Take bubonic plague for example. The disease is most commonly transmitted to humans through flea bites, and the fleas live on rodents.
以黑死病为例。这种疾病最常通过跳蚤叮咬传染给人类，跳蚤生存在啮齿类动物上。
4·It is transmitted between animals and humans by the bite of infected fleas, direct contact, inhalation and rarely, ingestion of infective materials.
它通过受感染跳蚤的咬伤、直接接触、吸入和极少摄入传染物在动物与人之间传播。
5·It contained two small paillasses full of fleas.
它包含两个满是跳蚤的小草铺。
1·It is transmitted exclusively when people who have little or no access to safe-drinking water supply swallow water contaminated with parasite-infected fleas.
该病的传播纯属当人们极少获得或者不能获得安全饮用水供应时饮用了含有受到寄生虫感染的蚤类的污染水。
2·And bubonic plague, spread by rat fleas, is normally preceded by the death of hordes of rats (only then do the fleas opt for humans). Yet no one in 1348 recorded this.
黑死病由鼠蚤传播，在此之前通常都有大批的老鼠死亡(只有在这时跳蚤才选择人类作宿主)，但在1348年没有人记录下这些。
3·Objective To study species and distribution of fleas in Zhangjiakou.
目的研究张家口市蚤的种类及其分布。
4·Objective: To investigate the constituent of flea species, the dominant fleas and their spatial distribution patterns in the natural epidemic focus of wild-rat type of plague in Yunnan province.
目的：调查研究云南省野鼠型自然疫源地蚤类组成、优势蚤种及其空间分布格局。
5·The bacteria are transmitted by lice, fleas, mites, and ticks.
不同种类的细菌靠虱、蚤、和蜱传播。