可以采取疫苗接种和其他预防措施。Vaccination and other prophylactic measures can be carried out.接种疫苗的成本合计约60万美元。The cost of the immunizations was about $600,000 all told.目前正在人类志愿者身上试验12种试用疫苗。Twelve potential vaccines are currently being ...
With great difficulty, the fisherman manoeuvred his small craft close to the reef.渔夫费了很大的劲才把他的小船划到暗礁旁。The water came up to the fisherman's thighs.水没到了渔夫的大腿。Barbary whistled a Ronssllon fisherman's song.巴伯里用口哨吹一...