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.蕨类植物和针叶树的木质部仅含有管胞.The xylem of ferns and conifers contains only tracheids.胞质流还仅仅是一种解释真菌中转移的假说.Streaming is still...
He gave us a warning against placing confidence in people we did not know.他告诫我们, 不要轻信我们不了解的人。The carer will have to do all the work: placing the patient on the seat, strapping him in, taking him off again at the top.护工将要...
Dysprosium lamp: Light source for repro - photography and printing down.镝灯: 复制照相及晒版用光源之一.Three 3500 W dysprosium lamps are installed on each tower crane for site lighting during night.罐体施工现场:在每台塔吊上装三盏3500W镝灯用于现场夜间照明.A su...
有些生物分子呈螺旋状.Some biological molecules have the form of a helix.叶片呈螺旋状开略带紫色白花的北美紫菀.North American perennial with apparently whorled leaves and showy white purple - tinged flowers.欧洲兰花,花色雪白,总状花序较短、呈螺旋状.European orchid havin...
The dog clung like a limpet to the thief.那条狗死死缠住小偷不放.The adhesion mechanism of barnacle , limpet, anemone, tube worm are described in this paper.主要介绍海洋生物中藤壶、帽贝 、 海葵 、 管栖蠕虫对其基材的粘附机理....