那些曾经恋爱不顺利的人都会同情休。Anyone who has been in a troubled relationship will sympathise with Sue.这次平稳顺利的飞行令人难忘。The smoothness of the flight was memorable.即便在顺利的情况下也不要松劲.Don't let down even if the going is good....
As indigenous oral bacteria, the Actinomyces are thought to contribute to caries especially to root caries.放线菌是口腔固有菌群中的主要菌属,与龋病尤其是根龋的发生、发展有密切关系.Firstly, a strain secreting blue pigments was separated from soil that was i...