溯源用英語怎麼説

　　溯源的`英文：

trace to the source

　　參考例句：

To trace up the source and inquire into the origin

溯源而上To trace a stream to its source

因流溯源trace是什麼意思：

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

殘餘污染物 They are trying to trace the source of the trouble.

他們正設法找出這件麻煩事的起因。They disappeared without leaving a trace.

他們不見了，沒有留下一點痕跡。TOU (Trace Operate Unit)

追蹤裝置|故障探測裝置 We traced the footsteps in the snow.

我們跟蹤雪地上的足跡。 source是什麼意思：

n. 來源，出處；原始資料；原因；發源地

They are trying to trace the source of the trouble.

他們正設法找出這件麻煩事的起因。Where is the source of the Nile?

尼羅河發源於何處？Is the water polluted at source?

河水是在源頭受到污染的嗎？We understand that sourcing is not static.

我們明白採購不是一成不變的。 Religion is not the only source of division.

宗教問題並不是分裂的唯一來源。