sometimes issued laughter
有时发出笑声
以上为机器翻译结果，长、整句建议使用 人工翻译 。
There are many elderly people in the central square dancing, as well as in rhetoric, sometimes issued by waves of happy laughter.
广场中央有许多老年人在跳舞，还有的在高谈阔论，时而发出一阵阵快乐的笑声。
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