<p>尝试:</p>
<pre><code>import re
from bs4 import BeautifulSoup
html = '''
<p id="p-9">
<span class="inline-l2-heading">H5N1 virus pathogenic phenotypes among
inbred mouse strains.
</span>
We experimentally inoculated 21 mouse strains with the highly
pathogenic H5N1 influenza A virus A/Hong Kong/213/03 (HK213)
and monitored the animals for 30 days thereafter for signs of
morbidity and mortality. The 50% mouse lethal dose (MLD<sub>50</sub>)
values varied from 40 50% egg infective doses (EID<sub>50</sub>)
for the influenza virus-susceptible strain DBA/2<sub>S</sub>
(susceptibility indicated by “S”) to more than 10<sup>6</sup>
EID<sub>50</sub> for the influenza virus-resistant strains
BALB/c<sub>R</sub> and BALB/cBy<sub>R</sub>
(resistance indicated by “R”) (<a class="xref-fig" href="#F1" id="xref-fig-1-
1">Fig. 1</a>).
</p>
'''
soup = BeautifulSoup(html, 'lxml')
p = soup.select('p')
for text in p:
para = text.get_text(' ').replace('\n','')
para = re.sub(' +', ' ', para)
print(para.strip())
</code></pre>
<p>印刷品:</p>
<pre><code>H5N1 virus pathogenic phenotypes among inbred mouse strains. We experimentally inoculated 21 mouse...
</code></pre>
<p>等等</p>