The diet should be suitable,being neither too rich nor too meagre.
饮食应该适当,既不能太油腻也不能太粗淡.
I am not in a position either to contradict or affirm this statement.
我既不能否定这一说法,又不能肯定这一说法.
He can neither read nor write English.
他既不能读英语也不能写英语.
Our stylistic options as writers are neither numerous nor glamorous.
我们作者的文风既不能变来变去,也不能故作玄虚.
The wave has neither discontinuities nor regions of infinite probability.
波既不能有不连续处,又不能有几率为无穷大的区域.
Just as the car industry can't afford to lag too far behind the consumer,it also can't afford to be too far ahead of him.
汽车业既不能落后于消费者的要求太远,也不能超前太多.