要记得，在这里的fx中,是作为常量保持不变的。，looking，at，the，situation，where，y，is，held，constant。,这是我用一个平行于xz坐标系的平面,横截了f，所得到的图形。
Remember, partial f, partial x was obtained by y That means I am slicing the graph of f by a plane that is parallel to the x, z plane.
下面我将讨论,完全失重状态,记得几节课之前,我将你系在,绳子的末端。
I now want to return to the idea of complete weightlessness and I want to remind you, a few lectures ago how I was swinging you at the end of a string in the vertical.
也许退后很难，那还记得小时候我们系错扣子怎么办吗。从错的那步重新开始。
Maybe regress is not easy to do . But do you remember what should we do when we buttoned wrong in the childhood? Renew from the wrong step.
港生：希望妳唔会唔记得， 我地系埋一齐既每一日，都系咁开心，我都系咁爱妳。
Raphael: I hope you wont forget…each day that we were together…was so happy, and I loved you so very much.
我记得和同学们在许多假期中去参加系里举行的长时间的各种会议。
I remember spending many a fall break and President's Day holiday with my fellow grad students in all day meetings brought to us by the computer science department.
我记得工程系学生们建立的一个比较成功的学生组织-工程系学生会。
I take with me the memory of a more successful graduate student effort, the establishment of the Association of graduate Engineering Students, known as AGES.
生活就像坐过山车，只要记得系好安全带。
Life is a roller coaster, just remember to fasten your seat-belt!
生活就像坐过山车，只要记得系好安全带。
Life is a roller coaster, just remember to fasten your seat-belt!
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