血管迷走神经性晕厥出现的先兆症状和体征有哪些?What premonitory signs and symptoms may exist for vasovagal syncope?血管迷走神经性晕厥的治疗措施有哪些?What therapies have been advocated for the treatment of vasovagal syncope?何种诊断检查有助于区分有危险的晕厥病人?What diagnostic t...
他此刻正在南美旅游观光。He's touring South America at this moment in time.最好是乘坐旅游巴士或骑自行车观光。Sightseeing is best done either by tour bus or by bicycles.观光巴士已经取代了火车。Tour buses have replaced railway cars....