溯的英文：
go upstream
trace the source

参考例句：
  • Salmon leaping upriver.
    鲑鱼溯河跃行而上
  • To where the green grass is more verdant
    向青草更青处漫溯，
  • To seek a dream? Just to pole a boat upstream To where the green grass is more verdant
    寻梦?撑一支长篙,向青草更青处漫溯
  • Its galleys could have penetrated up the rivers to the heart of Russia.
    它的大木船溯河而上可以深入俄罗斯的腹地。
  • Leaped over the wall;salmon leaping upriver.
    跃过围墙;鲑鱼溯河跃行而上
  • Our current awareness of an integral endocrine and metabolic response to injury may be traced to two streams of thought
    我们目前对侮辱所引起的整个内分泌和代谢反应的了解，溯源于两种思潮。

upstream是什么意思：
ad. 向上游,逆流地
a. 向上游的,逆流而上的
n. 【生物】上游
  • We turned upstream to find a crude wooden bridge.
    我们转向上游走，发现了一座粗制的木桥。
  • Learning is like rowing upstream: not to advance is to drop Back
    学职逆水行舟,不进则退
  • The fish were madly pushing their way upstream to spawn.
    鱼群为产卵而疯狂地向上游挤进。

trace是什么意思：
n. 痕迹；踪迹；微量；迹线
v. 追溯；回溯；跟踪，追踪；描绘；探索；沿路走
  • trace contaminant
    残余污染物
  • They are trying to trace the source of the trouble.
    他们正设法找出这件麻烦事的起因。
  • They disappeared without leaving a trace.
    他们不见了，没有留下一点痕迹。

source是什么意思：
n. 来源，出处；原始资料；原因；发源地
  • They are trying to trace the source of the trouble.
    他们正设法找出这件麻烦事的起因。
  • Where is the source of the Nile?
    尼罗河发源于何处？
  • Is the water polluted at source?
    河水是在源头受到污染的吗？

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