PHRASE
(引出另一种选择)如果不能的话，万一不行的话
You say failing that to introduce an alternative, in case what you have just said is not possible.
例句
Find someone who will let you talk things through, or failing that, write down your thoughts.
找个能让你把事情说清楚的人，如果不行的话，就把你所想的写下来。