Example sentences of "when see at " in BNC.

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1 Joins on silver or gold objects made with silver and gold solders can not usually be distinguished by radiography because they are approximately the same density as the metals they join , although they can sometimes be identified by colour difference or porosity when seen at high magnification .
2 Before any submicroscopic helical structures ( such as molecules , microtubules , flagella and viruses ) were known , H. R. Crane , whom I mentioned earlier , said ‘ … any structure that is straight or rod-like when seen at low magnification is probably a structure repeating along a screw axis ( ie , it is a helix ) .
3 Some aposematic prey that are conspicuous when seen at close quarters appear cryptic when living in family groups and viewed from a distance .
4 In theory the dazzle explanation makes sense , because the zebra patterning is just about as vivid as it can be , when seen at close quarters , but once again the facts do not support this idea in practice .
5 When seen at the age of six , he had poor muscle control and could not fasten up his buttons or tie his shoe-laces .
6 The road tops a hill and commences a long descent to a built-up area that , even when seen at a distance , is obviously a place of greater importance than any yet seen on the journey .
7 Observers in northern latitudes can never really appreciate how superb the star-clouds really are ; when seen at high altitude they are striking by any standards .
8 In the novels of the eighteenth century and Regency , the great houses of England occupy the foreground , while its cottages , when seen at all , are merely glimpsed as details in the scenery .
9 Drake very distinctive , being the only waterfowl to appear white in front and black behind when seen at a distance .
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