0 not allowed -- 不允许的,不许可的
There are certain topics of conversation that are impermissible in polite society. 有一些话题在上流社会中属于禁区。
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。