首先，在打折的同时我们要保证盈利不低于平时的50%，在这个前提下我们可

首先，在打折的同时我们要保证盈利不低于平时的50%，在这个前提下我们可以根据不同的情况进行调整。

結果 (英文) 1:

First of all, on sale at the same time we want to ensure that profits are not lower than the usual 50%, and in this context we can be adjusted according to different situations.

結果 (英文) 2:

First, we want to ensure that discounted profit of not less than 50% of the usual, in this context we can be adjusted according to different situations.

結果 (英文) 3:

First, in the discount at the same time we want to ensure that earnings are not less than 50% of the usual, in this context we can adjust according to different circumstances.