It was a vegetarian and probably snacked on pine needles and ferns.它属于食草动物,可能主要吃松针和蕨类植物.The xylem of ferns and conifers contains only tracheids.蕨类植物和针叶树的木质部仅含有管胞.Blackboys sprouted out of the thick undergrowth of ferns a...
岩石的纹理特征the textural characteristics of the rocks顺着木材的纹理刷上厚厚的一层漆。Brush the paint generously over the wood in the direction of the grain.翘曲多发生在螺旋或交错纹理的板材中.Twisting arises in boards through the presence of spiral or interlo...
Finally, DNA ligase newly synthesized DNA chain and the original links.最后DNA连接酶将新合成的DNA链与原来的链接上.Methods: The restriction endonuclease and T 4 DNA ligase were used to construct the vector plasmid.方法载体的构建采用限制性内切酶酶切、4DNA连接酶...
A flight of stone steps leads to the terrace.一段石阶通向露台。Steps taken now to maximise your health will pay dividends later on.现在采取措施增强体质会使你日后受益。I waved goodbye and went down the stone harbour steps.我挥手告别，然后走下港口石阶。...
The umpires consulted quickly.几位裁判快速商量了一下。It would be impracticable for each member to be consulted on every occasion.不可能每一次都征求每个成员的意见。They consulted the oracle at Delphi.他们在德尔斐神示所向神请示。...
He fell into a deep dreamless sleep.他酣然入睡，一夜无梦。Within the hour he had slipped once again into deep and dreamless oblivion.不出一小时，他再次陷入了无梦的沉睡。Finally, exhausted and exhilarated , he soon fell into a mercifully dreamless sl...