"the rolloff of the external bank lines"中的rolloff怎么翻译呢?

the rolloff of the external bank lines中的rolloff怎么翻译呢? 将下列英文翻译成中文,英语高手来,谢绝翻译软件直译!Measurements made on the comparators include small signal gain, rolloff point, and propagation delay. The first two of these are shown in Fig. 6. The low-frequency gain is 55 dB, The path of the the ball of the the salt of the the first of the The picture of the The Return of the the days of the the price of the the content of the the life of the the year of the the barks of the The Laugh of the the middle of the the head of the the rest of the