1. 认识这个词（基础篇）
词：justifiable
英英释义：existing or done for a good reason, and therefore acceptable
例句：The counter-attack is justifiable on the grounds of self-defence.
2. 体会这个词 （进阶篇）
我们之前学过动词 justify 的用法，今天我们学习它的形容词 justifiable。根据它的英文释义，我们知道它常用来表示“正常的”“情有可原的”，因此常用来替换 acceptable 和 good reason to do something。我们通过几个例子掌握它的用法。
justifiable 可以和我们之前学过的 grounds（表示“理由）连起来用，表示出于某个理由，这种做法是情有可原的。比如出于自卫，反击是合情合理的：
The counter-attack is justifiable on the grounds of self-defence.
我们平时说的“说不过去”就可以说成“be hardly justifiable“。比如我们常说的“一命换一命”，这种说法是可以理解的，但是很多情况下是不正当、说不过去的：
What he has done is understandable but hardly justifiable.
和大多数形容词一样，我们可以用在它前面加一个副词，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》中也经常用到 justifiable，比如：
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 whale stocks, which allows hunting within the limits that science deems justifiable, and is now a conservation body.
3. 从认识到会用（作业）
1）翻译下面的句子： 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 was ill-conceived but economically
（参考翻译：The policy was ill-conceived but economically justifiable.）
2）结合自己的生活、学习、工作、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。
大学毕业后在家啃老是说不过去的。
Relying on parents after graduating from college is hardly justifiable.
