A Bludger hit Harry squarely in the small of the back and he flew forwards off his broom.

一个游走球正中哈利的后腰，他从扫帚上飞了出去。

And we lift up from the pelvic floor and we reach the right hand to the small of the back or the sacrum, and we open up through the chest.

我们从骨盆底抬起，右手伸到背部或骶骨，然后打开胸腔。

He tapped Hagrid in the small of the back (being unable to reach his shoulder) , muttered something to him, and then the pair of them made their way back across the pub toward Harry and Hermione's table.

他拍了拍海格的腰背部（因为够不着海格的肩膀），低声对他嘀咕了几句什么，然后两一起回过身，朝哈利和赫敏的桌子走来。