渡船是苏格兰边远地区的生命线。Ferries are a lifeline to the far-flung corners of Scotland.煤炭和钢铁曾是这个地区的生命线。Coal and steel were the region's lifeblood.额外补助对大多数单身母亲来说都是赖以生存的生命线。The extra payments are a lifeline for most single mother...
非 疫源地内未发现抗体阳性者.And the antibodies were not detected in healthy population of non - epidemic area.结论:长白山区是莱姆病重要疫源地,人群中有莱姆病感染存在,并有莱姆病发生.There are infections of Lyme disease among the mountain residents in Changbaishan.高原生物...