0 If a period of time or series of events leads up to an event or activity, it happens until that event or activity begins: --
The pilot had no recollection of the events leading up to the crash.
1 to prepare to talk about something by gradually mentioning the subject you want to talk about: --
2 if a period of time or series of events leads up to an event or activity, it continues until that event or activity begins: --
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.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.