can be very difficult to predict
会很难预测吗
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"It can be very difficult to predict collapse because there is very little surface evidence of the features, " says Dr Vanessa Banks, an expert in shallow geohazards and risk at the British Geological Survey.
BBC: Who, What, Why: How are sinkholes formed?
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