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她说话声音很轻，但使用了非常粗俗的言辞。
She spoke in a quiet voice but used remarkably coarse expressions.
《柯林斯英汉双解大词典》
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起初，他以为那不过是落叶声，因为那声音很轻很细。
He thought it was only falling leaves at first, so slight and delicate was the sound of it.
youdao
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她的声音很轻，我几乎听不见。
Her voice was so low that I can barely hear.
youdao