VOA慢速英语:First US Woman to Lead Combatant Command

短语讲解：

1. NORTHCOM is mainly responsible for civilian support and homeland security while also supervising NORAD, according to the U.S.

be responsible for 为…负责，形成…的原因; 主管
例句：You'll be responsible for anything wrong.
出了事唯你是问。
according to 根据，按照
例句：According to her, grandfather called at noon.
据她说,祖父在中午打来电话。