Example sentences of "that they can only be [vb pp] " in BNC.

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1 Most fungi grow as long thin threads called hyphae — they are so slender that they can only be seen under a microscope , but a mass of intertwined hyphae is visible : this is what makes up toadstools and mushrooms .
2 They are so small that they can only be seen with a microscope .
3 Where the land meets the sea there are hundreds of beaches and coves , some so secluded that they can only be reached by boat .
4 And we need to use the reserves that we do have in the balance sheet , we need to spend them wisely in order to achieve our objectives , our objectives for change , and we must recognise that they can only be spent once .
5 Either the physical limits of the item are wide , so that the design and production of the mating parts become difficult and expensive , or they are narrow so that they can only be produced by expensive processes .
6 Either the physical limits of the item are wide , so that the design and production of the mating parts become difficult and expensive , or they are narrow so that they can only be produced by expensive processes .
7 But their limitation has been that they can only be used when all the well data is available — after it has been drilled .
8 The advantage of own brands for the retailer is that they can only be purchased from that particular company .
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