if worst comes to worst: 万一出现最坏的情况
If the worst comes to the worst, we'll start all over again.
大不了再从头开始。
If the worst comes to the worst and you lose your job, at least I will still be working.
万一出现最坏的情况，你丢掉了工作，起码我还有工作。

blind date: 男女初次见面
My wife and I first met on a blind date arranged by her sister.
我和我妻子初次会面是由她姐姐安排的。
We met on a blind date.
我们是经介绍认识的。

show up:出现
We waited until five o'clock, but he did not show up.
我们一直等到了5点，但是他始终没有露面。
She dressed herself up and found nowhere to show up.
她装扮得整整齐齐，却无处可去炫耀。