福克斯新闻 马航客机在乌克兰境内被击落

While cautiously staying away from laying out definitive¹ blame…President Obama does say the surface-to-air missile fired at the Boeing 777 was launched from Ukrainian territory controlled by Russian-supported separatists.

(President Obama) "Over the last several weeks, Russian-backed separatists have shot down a Ukraninan transport plane and a Ukranian helicopter."

A feat², the President says takes sophisticated training. His Ambassador to the UN going even further, telling the Security Council the U.S. has not ruled out assistance from Russian personnel.

At the White House, Jared Halpern, Fox News Radio

1 definitive   

adj.确切的，权威性的；最后的，决定性的

参考例句：

• This book is the definitive guide to world cuisine.这本书是世界美食的权威指南。
• No one has come up with a definitive answer as to why this should be so.至于为什么该这样，还没有人给出明确的答复。

2 feat   

n.功绩；武艺，技艺；adj.灵巧的，漂亮的，合适的

参考例句：

• Man's first landing on the moon was a feat of great daring.人类首次登月是一个勇敢的壮举。
• He received a medal for his heroic feat.他因其英雄业绩而获得一枚勋章。