Wild waterfowl are considered the natural reservoir of all influenza A viruses.野生水鸟是A型流感病毒的天然宿主.Computer systems throughout the country are being affected by a series of mysterious rogue programs, known as viruses...全国的计...
“那件衣服很好看，”迈克尔说。“谢谢，”她严肃地回答。"That's a nice dress," said Michael. "Thanks," she replied solemnly.他们让我坐下，然后和我严肃地探讨了有关性的话题。They sat me down and had a serious discussion about sex.“现在阻止他已经太晚了，”哈里斯严肃地说道。"It's too lat...
A landmine is a kind of weapon used in war.地雷是一种运用于战争的武器.The treaty bans the use, production and trade of landmine.那条约禁止使用, 生产,和交易雷.This is Yang Zhiyuan undoubtedly revive ambuscade below countless landmine.这无疑为杨致远的复兴埋伏下...