大约三次
About three times
以上为机器翻译结果，长、整句建议使用 人工翻译 。
一个月大约三次。
About three times a month.
youdao
大约三次。
About three times.
第三次浪潮大约发生在一万或九千年前，见证了东北亚的祖先群体向现代爱斯基摩人和阿留申人的迁移。
The third wave, perhaps 10,000 or 9,000 years ago, saw the migration from North-east Asia of groups ancestral to the modern Eskimo and Aleut.
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