Consequently, for this object the position y, at any time t is known to be 15+10t-5t^.

因此,对这个物体来说,在任意时刻的位移y,就应该为15+10t-5t^

耶鲁公开课 - 基础物理课程节选

B + A would be--First draw B and from there you draw A.

+ A 就是先画矢量 B,然后再画矢量 A

耶鲁公开课 - 基础物理课程节选

Just as forewarning for people who have forgotten what a median is, that means half of you--not approximately half, it means exactly half of you-- will be getting something like B+ and below and half will get something like B+ and above.

稍微提示下忘记中位数含义的同学,这也就是说,不是一半左右,是绝对一半的同学,会得到B+的成绩或更低的成绩,另一半会到B+的成绩或更高的成绩

耶鲁公开课 - 博弈论课程节选

In that case, y will be -gt^/2+c+bt.

在这个情况下y=-gt^/2+c+bt

耶鲁公开课 - 基础物理课程节选