buttock的第三人称单数怎么拼写

n.臀部，屁股，艄，船尾，[跤]背摔v.[跤]背摔...

buttock的现在完成时为：buttocks...

buttock的复数形式为：buttocks...

buttock的现在进行时为：buttocking...

buttock的音标：buttock的英式发音音标为：['bʌtək]buttock的美式发音音标为：['bʌtək]...

There is still pain at bottom vertebra of the buttock!屁股处的尾椎骨还在一阵阵的痛!Is long afterbirth above the buttock how one and the same?屁股上面长胞是怎么一回事?In my thigh and buttock ( touches his right buttock ).在我的大腿和屁股....

buttock的一般过去时为：buttocked...