The United States has imposed sanctions on Rwanda for its alleged support of a group that uses child soldiers. State Department official announced that sanction Thursday in an online forum with African reporters. _______________________美国对卢旺达实施制裁,因其声称支持一个使用童军的组织.周四,一个在线论坛上一些非洲记者报道,美国国务院官员宣布制裁.___________________