溯的英文：
go upstream
trace the source

參考例句：
  • Salmon leaping upriver.
    鮭魚溯河躍行而上
  • To where the green grass is more verdant
    向青草更青處漫溯，
  • To seek a dream? Just to pole a boat upstream To where the green grass is more verdant
    尋夢?撐一支長篙,向青草更青處漫溯
  • 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羅斯的腹地。
  • Leaped over the wall;salmon leaping upriver.
    躍過圍墻;鮭魚溯河躍行而上
  • Our current awareness of an integral endocrine and metabolic response to injury may be traced to two streams of thought
    我們目前對侮辱所引起的整個內(nèi)分泌和代謝反應(yīng)的了解，溯源于兩種思潮。

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.
    我們轉(zhuǎn)向上游走，發(fā)現(xiàn)了一座粗制的木橋。
  • Learning is like rowing upstream: not to advance is to drop Back
    學(xué)職逆水行舟,不進(jìn)則退
  • The fish were madly pushing their way upstream to spawn.
    魚群為產(chǎn)卵而瘋狂地向上游擠進(jìn)。

trace是什么意思：
n. 痕跡；蹤跡；微量；跡線
v. 追溯；回溯；跟蹤，追蹤；描繪；探索；沿路走
  • trace contaminant
    殘余污染物
  • They are trying to trace the source of the trouble.
    他們正設(shè)法找出這件麻煩事的起因。
  • They disappeared without leaving a trace.
    他們不見了，沒有留下一點(diǎn)痕跡。

source是什么意思：
n. 來源，出處；原始資料；原因；發(fā)源地
  • They are trying to trace the source of the trouble.
    他們正設(shè)法找出這件麻煩事的起因。
  • Where is the source of the Nile?
    尼羅河發(fā)源于何處？
  • Is the water polluted at source?
    河水是在源頭受到污染的嗎？

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