Lengths of bone fashioned into flutes were in use 40,000 years ago.
人类40000年前就开始使用骨头制成的笛子。
单词 | were in use |
例句 |
原声例句
经济学人-文艺 Lengths of bone fashioned into flutes were in use 40,000 years ago. 人类40000年前就开始使用骨头制成的笛子。 |
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