implement
a tool or an instument,often one that is quite simple and that is used outdoors.
工具,器具,（常指）簡單的戶外工具.
例如：agricultural implements農(nóng)具.
instrument
1.a tool or device used for a particular task,especially for delicate or scientific work.
2.=musical instrument
1.（我的翻譯）用于特殊任務(wù)（目的）,尤其是精密或者科學(xué)工作中.
2.樂器.
例如：surgical/optical/precision instruments外科器械,光學(xué)儀器,精密儀器.
還有其他意思我就不說了,我覺得你應(yīng)該問的是這個區(qū)別吧!希望對你有用!