皇室战争三阶哪几张好:"the rolloff of the external bank lines"中的rolloff是什么意思？

请问"the rolloff of the external bank lines"中的rolloff是什么意思呢？ "the rolloff of the external bank lines"中的rolloff是什么意思呢？ "the rolloff of the external bank lines"中的rolloff是什么意思？ "the rolloff of the external bank lines"中的rolloff是什么意思啊？ "the rolloff of the external bank lines"中的rolloff什么意思呢？ "the rolloff of the external bank lines"的rolloff是什么意思呢？ "the rolloff of the external bank lines"中的rolloff怎么翻译呢？ "one of the least"是什么意思？ the opposite word of "difficult" "the work of Picasso"是什么意思？