They have had to counter doubts over their ability to host the event since the announcement was made that South Africa had been selected to host the first ever football World Cup on African soil.

VOA: standard.2010.01.22

They integrate their DNA into the host genome and you might not want to make that kind of a change in the cell.

而且也许你也并不想让逆转录病毒基因,整合进宿主的基因组

耶鲁公开课 - 生物医学工程探索课程节选

With their first experience as a host country for a FIFA event nearly behind them, Egyptians are looking ahead to the World Cup in South Africa next year, and are anxious to share their experiences with their fellow Africans.

VOA: standard.2009.10.12