Most fossil specimens are little more than carbon impressions although distinctive shapes are known . 尽管清晰的形状已为人所知，但大多数化石标本只不过是炭质印痕。
So far as is known to the writer, a similar theoretical treatment for a thin two-dimensional sheet has not been carried out . 据作者所知，至今还没有人对二维薄片进行类似的理论处理。
Little is known of his reign, though in local legend it figures as a time of romantic chivalry . 关于他统治时代的历史所知不多，虽然在当地的传说中，它是以一个传奇的骑士气概的时代出现的。
I have never known her to do it before, for as a rule she takes no interest in the village folk at all . 就我所知，她从来没这么干过；因为照老习惯，她对这个村子里的乡下佬压根儿就不感兴趣。
The major sources of the material in this work can generally be identified despite our slim knowledge of the classical period . 书中材料的主要来源一般都能查到，尽管我们对古典时期所知甚少。
Mrs. butler recollected that her husband was not possessed of the information necessary to form a judgement upon the occasion . 布特勒太太想她丈夫对这事所知有限，对这个问题也难以作出判断。
To our knowledge, the effect of genetic variation in leaf angle and dispersion has not been adequately quantified in trees . 据我们所知，在叶片角度和分布上遗传变异的效应，在树木中还没有被适当地定量研究过。
He was to live entirely with the other question, that of his unidentified past, that of his having to see his fortune impenetrably muffled and masked . 他将完全带着另外一个问题活下去，那就是他的过去，不为人所知，而他必须让他的命运紧紧地裹起来，严严密密地遮掩起来。
As far as anybody knows , you ' re back on the force 正如大家所知，你有坚强的后盾
I use the english words i know in different ways 以不同方式使用所知的英文单字
