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...
The main classes of materials are metals, polymers, ceramics, and composites.材料的主要分类为金属 、 高聚物, 陶瓷, 及合成材料.Silane coupling agents are also used in many commercial sand - epoxy - type composites.硅烷偶联剂亦用于许多通用的砂子环氧型复合材料中.Many...
Restarting the engine, we motored downriver.我们重新启动马达，沿河而下。Sightseers drifted downriver on a raft.观光客们乘着木筏漂向下游.It is fit to plant in Liao middle - downriver plain, the South from Shenyang.适宜沈阳以南辽河 中下游 平原稻区推广种植....
大部分注销的资料应加以毁损,以防止未经批准的转售他处.Most discarded material is mutilated or destroyed to prevent unauthorized resale elsewhere.那样的行为将会毁损他的名誉.Such conduct will be derogatory to his reputation.车胎上的油会毁损车胎.Oil on your car tires will ...