aim to do与aim at doing的区别

题目

aim to do与aim at doing的区别
Some research is to be aimed ____a new cure for the disease.
A.to find B.to finding C.in finding D.at finding
为什么答案一定要选D,而不选A?

答案

aim:
aim to do sth/ aim at doing sth./ aim at sth 指望,旨在,针对
Businesses will have to aim at long-term growth,not the present profit.
aim sth at:aim a gun at the animal / aim a pipe at the puma 把…瞄准,把…指向；把…掷向
aim 靶子,目标/目的,志向；宗旨 take aim at (对…)瞄准
aim at,aim to
aim at 是“瞄准”、“针对”的意思.例如：
He is aiming at the target.
他在瞄靶.
I am not aiming at you.
我不是针对你.
aim to do（美）= aim at doing（英）,是“目的在于”的意思,但在具体句子中可以有不同的含义.例如：
He aims at mastering English.
他目的在于掌握英语.
He aims to master English.
（同上）
下面两句 = I hope to finish it tomorrow.
I aim at finishing it tomorrow.
I aim to finish it tomorrow.
我想在明天完成它.
下面两句 = I try to learn ten new words by heart every day.
I aim at learning ten new words by heart every day.
I aim to learn ten new words by heart every day.
我要每天记十个新词.