对此，美国奥杜邦环保协会纽约分会公民科学处处长约翰.劳登表示“这种情况之前曾发生过一次，造成这种现象是由多种原因综合作用而成。
“It’s only happened once before. It’s a confluence of circumstances that come together to cause this,” said John Rowden, citizen science director at the Audubon Society’s New York chapter.
二月份，白宫发言人约翰·贝纳极不情愿地承认他会采纳奥巴马所说的他是一个公民，示意证据不充分。
The House speaker, John Boehner, grudgingly said in February that he would take Mr. Obama "at his word" that he was a citizen, a suggestion that the proof was insufficient.
公民与环境咨询公司（Civil &Environmental Consultants Inc）的工程师维克托·约翰逊表示，这种处理方法的原理相当简单。
The principle is straightforward, said Victor R. Johnson, an engineer with Civil &Environmental Consultants Inc.
应用推荐