单词precursor
n.: 前驱；预兆；前任；先兆
网络: 先驱者；前体细胞；前驱物
【原子能】前驱波;初级粒子
预报器
先质
产物母体
〔化〕原料;母体
预兆;先兆
前身细胞
前辈,前驱,先锋;前任
〔遗〕前体
前兆,预兆,先驱
复数：precursors
n.forerunnerancestorpredecessorantecedentpioneer
n.successor
By the end of the next decade, a simple blood test could alert doctors to a wide variety of cancer precursors.
下世纪末，医生可以用简单的血样化验预告更多种的早期癌症。
Despite years of searching for earthquake precursors, there is currently no method to reliably predict the time of a future earthquake.
虽然对地震前兆的研究已有多年，但至今仍没有办法能够可靠的预计到未来地震发生的时间。
The question, however, is why it is only a mild recession, since precursors of a depression were surely present.
但问题是，既然萧条的先兆已显露无疑，为何这仅仅是一场温和的衰退呢？
Without doubt, the United States is exhibiting some of the classic precursors to out-of-control inflation.
无庸置疑的是，美国市场已经呈现出无法控制的通货膨胀的预兆。
The REMs, which appear to be at the origin of the dream stage of sleep, can be blocked or amplified by chemical inhibitors or precursors.
似乎是处在睡眠的做梦阶段开始时的快速眼动，却可以受到化学抑制剂或先兆的堵塞或扩大。
For our evolutionary precursors out in the wild, the fight-or-flight response was a valuable survival mechanism.
对于那些处于野外进化中的祖先来说，逃跑或战斗响应是一个宝贵的生存机制。
Even if precursors existed, a few observations would not lead to prediction, because their signature would vary with place and time.
前兆即便存在的话，少量的观察无法导致预测，因为其特征将因地因时而异。
In this framework, countries in which research on precursors is still encouraged and funded are very few.
在这样的框架下，在继续鼓励对地震前兆进行研究的国家经费很少。
Given that years of effort have led to no widely accepted precursors, perhaps there are no valid earthquake precursors.
考虑到这么多年的努力没有导致任何普遍接受的前兆，有效的地震前兆或许就根本不存在。
The results indicated that the structure composes and crystallinity of precursors had been affected with improvers adding.
研究结果表明，改进剂的加入对前驱体的结构组成和结晶状态产生一定影响；