swear是发誓的意思pledge是保证的意思swear on以。。。起誓swear at咒骂swear程度比pledge更深tumour：肿瘤
肿瘤怎么说？liver tumour谣言=rumourspledge = 信约(名词),承诺(动词)swear = 发誓 (动词)
