今天我们要学的词是crucial。 Crucial, 是关键的意思。Crucial factor, 是关键因素，crucial decision, 是关键决策。美国2008年总统大选的共和党参选人，原田纳西州参议员汤普森星期二晚上首次参加公开...
President Barack Obama and Mexico's President Felipe Calderon hold a joint news conference in the Rose Garden of the White House in Washington, 19 May 2010 U.S. President Barack Obama says he is pleased the United States has reached an agreement with...
