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- precusors of odontoblast 造牙本质细胞的前体细胞
- The precusors of dinosteranes were dinoflagellate algae developed in the saline and brackish water environments. 在这些环境中发育的甲藻类是甲藻甾烷的先质物。
- L arginine ( L Arg), a precusor of NO, had no direct effect on sleep and W, but blocked the effect of L NNA. NO前体L?精氨酸（L?Arg）对睡眠?觉醒无直接影响，但可对抗L?NNA的促睡眠效应。
- Researchers implicated several regulatory factors and complex interactions with the epithelial-derived ameloblasts in the regulation of odontoblast differentiation. 研究者已经注意到在成牙本质细胞分化调节过程中的几种调节因子及其与上皮源性成釉细胞间复杂的相互作用。
- Dehydroepiandrosterone is the precusor of sex hormone,and can be synthesized in the brain de novo,which means it is a kind of neurosteroid. 脱氢表雄酮(DHEA)是人体性激素的前体物质,能够在大脑神经元以及星形胶质细胞中从头合成,属于神经甾体。
- How can I persuade you of my sincerity? 我如何能够让你相信我的诚意？
- There is a vein of melancholy in his character. 他的性格中有少许忧郁的气质。
- A bowl of hot chicken soup is good for you. 喝一碗热鸡汤对你有好处。
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- This strain of wheat can grow during a cold spring. 这种小麦可以在寒冷的春天生长。
- Have a glass of beer to rinse your dinner down. 喝杯啤酒把你吃的晚饭冲下去。
- I bought a pair of tan leather shoes the other day. 前几天我买了双棕褐色的皮鞋。
- Your work falls short of my expectations. 你的工作未达到我的期望。
- He bit off a large piece of the apple. 他咬下一大块苹果。
- He emphasized the importance of careful driving. 他强调小心驾驶的重要性。
- I have a huge pile of letters to deal with. 我有一大堆信件要处理。
- He gave a description of what he had seen. 他描述了他所见到的一切。
- It is a fact of life and you must face it. 这是严酷的现实，你必须面对它。
- It is wrong of you to bully the child. 你不该欺侮那个孩子。
- I need a piece of string to tie this parcel up. 我需要一根细绳把这包裹扎起来。
