at the back of造句

There was a metallic taste at the back of his throat.
他喉咙深处有一股金属味儿。

Hamstrings are supporting muscles at the back of the thigh.
腿筋是位于大腿后侧起支撑作用的肌肉。

There are explanatory notes at the back of the book.
书后有注解。