帮忙翻译两个句子，英译中~
1.When depressed these patients experience painful sadness, negative thinking, and indifference to things that used to bring them happiness.
当抑郁的时候，这些病人经历着痛苦的悲伤，消极的想法，而且对那些过去带给他们幸福的事物漠不关心。
2.Human learning and memory have been studied mostly with verbal material (such as word lists and stories) or with tasks requiring motor skills (such as learning to type or to play an instument).
人类的学习和记忆大部分通过口头的材料（如单词清单和故事）或者用要求运动技能的任务（如学习打字或者演奏一项乐器）来进行研究。
instument是什么意思
instrument
英 [’ɪnstrʊm(ə)nt]
美 [’ɪnstrəmənt]
n.
仪器；工具；
乐器；手段；器械
implement和instrument有什么区别
implement
a tool or an instument,often one that is quite simple and that is used outdoors.
工具,器具,（常指）简单的户外工具.
例如：agricultural implements农具.
instrument
1.a tool or device used for a particular task,especially for delicate or scientific work.
2.=musical instrument
1.（我的翻译）用于特殊任务（目的）,尤其是精密或者科学工作中.
2.乐器.
例如：surgical/optical/precision instruments外科器械,光学仪器,精密仪器.
还有其他意思我就不说了,我觉得你应该问的是这个区别吧!希望对你有用!
-instument
