欧洲尝试在不必为信贷违约掉期合同埋单的情况下削减希腊主权债务，这更加剧了下行螺旋。
This downward spiral may have been exacerbated by Europe's efforts to cut the value of Greek sovereign debt without triggering a payout on credit-default-swap contracts.
一根：要做单根面，厨师首先将面团做成细长的圆木状，然后盘成螺旋形(有点象棒棒糖)。
One strand: To make the single-strand noodle, the chef first prepares the dough by rolling out a thin log that is then laid flat in a spiral (it somewhat resembles a lollipop).
莱特兄弟在1903年12月17日用一架轻而薄的，单螺旋桨的飞机实现了一系列短距离飞行，从而证明了这并非不可能。
The Wright brothers proved otherwise on December 17th 1903, making a series of short flights in a flimsy, single-propeller plane.
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