I think it's the political implications of this missile test that are noteworthy-and that is that Iran views the talks as dead-it doesn't view the talks positively, and now it's bracing for sanctions and quite possibly for war, and this missile test is a sign that Iran takes the military option very seriously and is ready to reciprocate if it's attacked."

VOA: standard.2009.12.18

Each test comes in advance with a prep sheet telling you how to get ready for that particular test.

每次测试前都会给你们考点,那里面会告诉你如何备考

耶鲁公开课 - 聆听音乐课程节选