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【词组讲解】
The newlyweds are sure to have butterflies in their stomachs because the trip includes 15 rollercoaster-type dives, known as parabolic arcs, which last up to 30 seconds.
婚礼期间，这两位新人心里一定会十五只吊桶打水——七上八下（注1），因为这次航程将有15次过山车式的俯冲，持续时间30秒。这种飞行方式，用航空专业术语说，叫做抛物线弧形俯冲。
butterflies in one's stomach 表示“心里紧张，七上八下”，例如：
I could feel the butterflies in my stomach as I waited.
我在等的时候心情十分紧张。
When Bol walked into the factory office to ask far job, he had butterflies in the stomach.
鲍勃走进工厂办公室求职时，感到紧张不安。
