aim at
1．point or direct（gun，etc．） towards瞄准；对准
The marksman aimed at the centre of the target．射手瞄准了靶心。
2．make an effort towards；try to gain立志要；目的在于
He aimed at becoming a professor．他立志要当一名教授。
This dictionary aims at explaining the most common mistakes in word use．本词典旨在解释用词上最常见的错误。