英语翻译下面几个句子用词力求精练：1．frombottomtoup,spreadingknowledgetoall2.lighterbackpacks,happierstudents3.theyhavechoice4.gettinghardtotellfactfromfiction

Question

英语翻译
下面几个句子用词力求精练：
1．from bottom to up,spreading knowledge to all
2.lighter backpacks,happier students
3.they have choice
4.getting hard to tell fact from fiction

Answer 1

1 自下而上,广授知识.
2 书包越轻,学生越乐.
3 他们有选择（余地）.
4 越来越难以分辨事实与虚构.