您要查找的是不是：
- Besides, the trace observations on the amount of B. xylophilus into pine twigs revealed that the peak period of nematode transmission advanced in higher temperatures. 通过对松褐天牛取食传入松枝的松材线虫量的追踪记录发现，随着温度的升高，传播线虫的高峰时段随之提前。
- Combining dynamic operation test, the influence of filamentous microbe on membrane fouling process was analyzed with tracing observation. 摘要结合动态运行试验，针对丝状菌对膜污染过程的影响进行了跟踪观察和分析。
- After many years tracing observation on these carriers, it can be found that ninny of them had chronic hepatitis, liver cirrhosis and liver carcinoma. 但本病患者若进行多年的追踪观察，却发现有相当多的人发生了慢性肝炎、肝硬化、肝癌等所谓的肝病三部曲；
- I can't trace that letter you sent me. 我找不到你寄给我的那封信。
- He spoke without a trace of emotion. 他说话时毫不动感情。
- Did the police find any trace of the murderer? 警方找到凶手的行踪了吗？
- They failed to find any trace of the runaways. 他们未能找到逃跑者的任何踪迹。
- There was barely a trace of salt in the soup. 汤里简直一点盐也没有放。
- The post office tried to trace the lost letter. 邮局设法查出那封丢失的信。
- The kids are learning to trace the letter. 孩子们学描字母。
- He always spoke with a trace of sarcasm. 他说话总带着一丝讽刺。
- He was taken into hospital for observation. 他被送进医院观察。
- Careful observation convinced them that is was so. 仔细的观察使他们相信情况是这样的。
- It's basically wrong to have observation taken off from hearsay. 以道听途说作为意见的根据是根本错误的。
- The powerhouse was trace out accurately later on a large scale map. 后来发电站被精确地描画在大比例地图上。
- A faint or fleeting indication; a trace. 模糊的暗示模糊的或一闪即逝的暗示; 迹象
- He is a man of little observation. 他是个观察力极差的人。
- They decided to put him under observation. 他们决定监视他。
- The country woke from her trace of two hundred years. 这个国家在沉睡了200年之后觉醒过来了。
- He was under observation by the police. 他受到警方严密监视。
