Example sentences of "[been] proven to be " in BNC.
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1 | The standard method of recovery must be taught because it has been proven to be effective during testing . |
2 | ‘ Such a man , with a good track record can fight for his plant and his people on the very strong grounds that investment in his region has been proven to be successful . |
3 | Those that have seemed to indicate that ESP might be at work have generally later been discredited : either the subject of the experiment has been proven to be a charlatan or the experimental procedure itself has been shown to be flawed . |
4 | The allergens produced by House Dust Mites have been proven to be dangerous ‘ triggers ’ especially for Asthma attacks and allergic Rhinitis ( nasal congestion without a ‘ cold ’ ) and even in cases of Eczema . |
5 | Dyed Glassfish have been proven to be susceptible to Lymphocystis and the white marks may not in fact have been white spot . |