大约有四百
About four hundred.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这是一个很大的惊喜，英国大约有四百年没有发现过野生海狸了！
It was a big surprise, wild beavers hadn't lived in England for around 400 years!
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当这本书完成时大约有四百页。
Approximately it has 400 pages when this book is completed.
Approximately has400 pages when this book is completed.
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