dress rehearsal

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A clown performs during a dress rehearsal for the "Slava's Snowshow" in Sao Paulo.
在圣保羅的一場“下雪了”的彩排中，一名小丑正在表演。
The performers for the opening ceremonies, going through a full dress rehearsal on Wednesday night.
星期二晚上，開幕式的演員進行了一次完整的帶妝彩排。
And his pursuit of ballistic missiles was a kind of dress rehearsal for today’s Iranian nuclear brinkmanship — complete with a covert Israeli campaign to undermine his weapons programs.
而他對彈道導(dǎo)彈的最求，更像是現(xiàn)如今伊朗核計劃的彩排。最終以色列的秘密行動葬送了他的武器計劃。

Hundreds of dancers and singers, many of them dressed in traditional costumes, strutted behind a marching band to Johannesburg's Soccer City stadium for the dress rehearsal of Friday's World Cup opening ceremony.

Last summer, Du adds, the city conducted a dress rehearsal for the Olympic Games.
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At 3:30 on a steamy afternoon in Hollywood, dress rehearsal for American Idol is running into messy overtime.
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The terrifying thing is that I suspect this is just the dress rehearsal for an even nastier era to come.
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the last time a theatre work is practised before the real performance, when it is performed with the clothes, stage, and lighting exactly as they will be for the real performance

The dress rehearsal of a play, opera, or show is the final rehearsal before it is performed, in which the performers wear their costumes and the lights and scenery are all used as they will be in the performance.
You can describe an event as a dress rehearsal for a later, more important event when it indicates how the later event will be.