下面这句话中的let go with my right hand 什么意思(讲述在学位授予典礼当中从校长手中接受学位和拂穗的整个过程)：
I reached out and shake the principal's hand with my right and at the same time I reached across my left hand and take the diploma.Then I let go with my right hand and move the tassel on my mortboard form the right side to the left side.