The stairway carpet is so frayed it threatens to unravel.铺在楼梯上的地毯磨损得很厉害，都快散了。What moves him is the desire to unravel the mysteries of nature.推动他们的还是解开自然之迷的愿望.There is still a good deal to unravel.还有不少问题要澄清....
另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.直到不久以前,人们对胸腺的功能尚不明了.The function of the thymus was unknown until relatively recently.动物的免疫系统由两个主要部分组成,即胸腺和骨髓系统.I...
It has now become clear how extraordinarily fecund a decade was the 1890s.现在已经很清楚19世纪90年代是多么超乎寻常、成就斐然的10年了。The pampas are still among the most fecund lands in the world.南美大草原仍然是世界上最肥沃的土地之一。This is a fecund animal.这是一只多产的...
肉样瘤病的肉芽肿无干酪化病灶.In sarcoidosis there are noncaseating granulomas.结节病是一种组织学上以 非 干酪化性肉芽肿形成为主要特征的特发性系统性疾病.Sarcoidosis is an idiopathic systemic disease characterized histologically by the formation of non - caseating granulo...
这个数目因人而异,叫做 “ 免税收入额 ”This amount varies from person to person and is called an'allowance '.总收入额中房屋契税的收入额和土地契税的收入额.The revenue collected from the housing contract tax and land contract tax against the total reve...