他们一步一步地达到了目标。

[误] They reached their aim step by step.

[正] They achieved their aim step by step.

注：达到目的或目标，常用的说法有三种：

1、achieve one\'s aim; 2、accomplish/achieve/fulfil a purpose;3、 achieve/attain a goal。三处一般不能用 reach 或 get 等动词。