meaning: existing or done for a good reason, and therefore acceptable 正常的，情有可原的，常用来替换 acceptable, 和 good reason to do sth
例：出于自卫，反击是合情合理的。The counter-attack is justifiable on the ground of self-defense.
“说不过去” be hardly justifiable
What he has done is understandable but hardly justifiable.
和大多数adj一样，我们可以在它前面加一个adv,表示在某方面是正当的，比如：
The argument of whether assisted dying is morally justifiable remains debatable.
《经济学人》用例：
1） Laws protecting animals are perfectly justifiable, not because they have rights, but because we value their welfare and are repulsed by acts of cruelty against them.
2) It is worth noting that Mr Trump's decision in March to meet with Mr Kim seemed ill-considered but, on balance, probably justifiable.
3) Japan's government says the International Whaling Commission (IWC) long ago abandoned its original purpose of managing whole stocks, which allows hunting within the limits that science deems justifiable, and is now a conservation body.
作业：
1. 翻译：这项政策虽然考虑不周，但是从经济上来说是情有可原的。
The policy is ill-conceived but economically justifiable.
2. 造句：情景：为说谎证名：比如丈夫为了给妻子带来生日party的惊喜。
It is justifiable that he lies to his wife where they are going in order to get her to a place where a surprise birthday party has been organized.
