I completely agree with this sentence (it's referred to the task). In order to prepare for the IELTS exam I used Google translate (considered one of the best MT) many times. In my opinion it is a very useful tool but on the other hand it can sometimes translate things totally wrong. In particular I think that Google's MT it's a good way to search for synonyms, because it not only provides the translation, but also many synonyms of the key work you enter. It can be a very useful tool also when you're searching for the meaning of a single word. In fact in this case, the research is a lot faster compared to the use of a dictionary. When you want to translate a complete sentence though, it shows the weakness of mechanical translation. In fact, MT only translates words one by one and the output is, most of the times, a non sense sentence. This is because especially in English, the same work can have different meanings when used in different context. Also many peculiar or slang expressions are translated in a wrong way. In conclusion, I think that for now, human translation cannot be replaced by MT, but it can be a useful tool if used in the right way.