Unit matrix

unit ['ju:nit]

n. 单位，单元;装置;个体;[数]单位数;

matrix ['metrɪks]

n. <数>矩阵;模型;基质;母体，子宫;

matri(mother)+x(名词后缀)→子宫；母体；铸型；模型；母岩

Touchdown! Touchdown! Touchdown!

达阵得分！ 达阵得分！ 达阵得分！

What is bothering you?

什么在困扰你？

On our way home that night I looked down and saw that the necklace was not around my neck any more. I told Pierre. We rushed back to the palace and looked for it.We asked everyone there if they had found a necklace, but without luck. We couldn't find it;

那天晚上在回家的路上，我低头一看，发现项链不再挂在我的脖子上了。我告诉了比尔。我们马上赶回王宫去寻找。我们询问了那儿的每一个人，问他们是不是拾到了一条项链。可是，真倒霉。我们找不到那条项链；它丢失了。