根据你的生活经验和所学的化学知识，判断下列做法正确的是（ ）
This question is so hard that very ______ students can answer it.
You don't have to __________ every new word in the dictionary while reading.
翻译下面的句子。
故天将降大任于是人也，必先苦其心志，劳其筋骨。
译文：
