Example sentences of "have been know for " in BNC.
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1 | Although they have been known for many years their evolutionary position is still hotly debated . |
2 | Other diuretics have been known for a long time , especially arsenical compounds of mercury . |
3 | Alcohol , opium , cannabis , and tobacco have been known for centuries and the history of each fills many books . |
4 | Variants of this reaction have been known for many years . |
5 | Variants of this reaction have been known for many years . |
6 | FLARES on the Sun have been known for many years to produce powerful bursts of X-rays , gamma-rays and charged particles . |
7 | The ancient Chinese believed that the electrical energy of the body flowed in specific channels known as the acupuncture meridians , and charts illustrating these have been known for several thousands of years . |
8 | Around forty of these drawings have been known for years from books and exhibitions , but as things are , I am the only person in the world at the moment to have complete knowledge of what that collection was in its entirety . |
9 | But we know very little about the animals which bore these scales and although a few articulated remains have been known for several years , they show very little anatomical detail and it is not easy to identify immediate relatives . |
10 | These letters have been known for some time , as the aggrieved Leone published them in a pamphlet in 1764 . |
11 | These are called reaves and , while they have been known for a long time , their age , extent and probable purpose have only recently been recognised . |
12 | The research has been done for some time and the results have been known for some time , yet still the Government do nothing . |
13 | As members will be aware , the Local Government Regions and Districts have been known for some time , and the areas of the Sheriffdoms were published at the beginning of the year . |
14 | Difficulties with the present ‘ grey gate ’ system , in which the starter pulls a lever to raise a 65 yard-long elastic tape , have been known for some years . |
15 | Difficulties with the present ‘ grey gate ’ system , in which the starter pulls a lever to raise a 65 yard-long elastic tape , have been known for some years . |