Just in time for the trial performance, I was able to maintain power in my singing despite the switch to a head voice.
就在试演的时候，尽管换成了头声，我还是能够保持唱歌的能力。
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Verdant Power recently completed a successful trial in New York City's East River, and the UK-based Marine Current Turbines is preparing for a 10.5 MW project off the coast of Wales.
Armed with the treaty, Europe could pack more of a punch in the world, or it could suffer from a trial of strength between the European Parliament and the union's other centres of power.