Laser beams may cauterize and heal ulcers.激光束可以烧灼和愈合溃疡.Lasers cauterize incisions , reducing bleeding and infection, sealing off nerve endings, and minimizing postoperative pain.激光可以麻痹伤口, 减少流血和感染, 封闭神经末梢, 将术后痛苦降低至最小....
她每星期打3次网球。She plays tennis thrice weekly.连本地托儿所每星期都要收费100英镑。Even local nurseries charge £100 a week.女仆每星期换一次床单。Once a week, a maid changes the sheets....
The news gave a fillip to the telecommunications sector.这个消息给电信部门注入了一针强心剂。technological developments in telecommunications电信技术的发展Futurists agree that these trends will grow as telecommunications networks become cheaper a...