Example sentences of "only [art] [det] millimetres " in BNC.

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1 Normally , these bubbles ( or vesicles ) are only a few millimetres across and quite thinly scattered , but sometimes , if the lava has been particularly gas rich , the rock is so honeycombed with large bubbles that it looks like some kinds of Swiss cheese ; more holes than solid .
2 Coral polyps are each only a few millimetres across but working together in colonies , they have produced the greatest animal constructions the world had seen before man began his labours .
3 Most are only a few millimetres long .
4 Remember that most adult gall insects are only a few millimetres long and only one or two millimetres wide .
5 Put a scrap of newspaper on the block or box and lower the strip until the drop is only a few millimetres above the paper .
6 The opening to the organ is only a few millimetres in diameter , and so it acts rather like a pin-hole camera , but one that focuses infra-red heat radiation instead of light .
7 When a cosmic-ray encounters solid matter then in most cases it penetrates only a few millimetres and leaves a detectable track .
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