but it only has to happen once
但这只需要发生一次
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Fina insists that will not happen but it has already banned the new generation of swimsuits once this year only to change its mind after coming under heavy pressure from manufacturers and sponsors.
虽然国际泳联坚称不会出现反复的情况，但他们今年亦曾禁止使用新一代泳衣，后又迫于制造商和资助人的压力改变主意。
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