It's just the matter of the schedule,that is,if it is convenient of you right now.
如果你们感到方便的话,我想现在讨论一下日程安排的问题。
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的,因为无法预见到洞穴探险者究竟会遇到什么性质的困难。