clumped怎么读？

The bacteria clumped together.细菌凝集一团.He clumped after her , up the stairs, into his barren office.他拖着沉重的步伐跟在她的后面上楼了, 走进了他那个空荡荡的诊所.The children's shoes were all clumped together in a corner.孩子们的鞋都堆在角落里....

adj.[医]成群的v.（树、灌木、植物等的）丛、簇( clump的过去式和过去分词 )，（土、泥等）团，块，笨重的脚步声...