aim at + 某事物以什么为目标（有try to do的意思）
be aimed at + 人或某事物针对什么人或事
例句
sb aim at sth/sb
He aimed at accuracy and perfection. (他力求准确和完美)
In saying this, I am not aiming at you. （我这话不是针对你说的）
sb aim sth at sth/sb
People aim this fashion annual at improving the taste of life.
（该时装刊物旨在提高人们的生活品味）
