Seven out of every 10 Guatemalans live in dire poverty and half cannot read or write.每十个危地马拉人中有七个生活在赤贫中，半数不会读写。A surprising number of teenagers leave school without being able to read and write.有些青少年还不会读写就辍学了，其数量之多令人惊讶。He couldn't read or write.他不会读写。