assignation的复数形式怎么拼写？

She had an assignation with her boyfriend.她和男友有个约会。Jane brings this guy she hardly knows back for some kind of assignation?简带那个她几乎不认识的家伙回来 吗 ?Norm approach for role assignation in grid workflow.网格工作流中角色分配的Norm方法....

assignation的音标：assignation的英式发音音标为：[ˌæsɪg'neɪʃn]assignation的美式发音音标为：[ˌæsɪɡ'neʃən]...

n.约会， 幽会，分配， 指派...