Question

turn away和turn down 都有拒绝的意思，两者有区别吗？可不可以换用？

Answer 1

turn away
1.走开；把脸转过去
2.转变方向；拒绝
3.转来脸去
4.打发走，驱逐，转过脸去

turn down
1.关小，调低,放低(音量)
2.拒绝，搌斥 , 否决(提案)

turn away指的拒绝通常是“把……打发走”，或者“对……不闻不问”
如：
Some refugees were turned away. There were too many hungry mouths to feed already.
一些难民们被打发走了，因为需要提供食物的饥民太多了。

turn down则更多指拒绝邀请，约会，提议等
如：
I turn down the offer.
我拒绝那提议（求婚）。

Answer 2

turn away:不准...入内, 走开, 转过脸, 解雇, 避免, 防止. turn down:(被)向下折转, 拒绝
turn down一般当拒绝用时较多 turn away一般与from连用表示拒绝之意

Answer 3

1 turn away 的感情色彩更浓
如：
To cause to turn away from what is right, proper, or good.
使堕落，使走邪路使远离正确的、合理的或好的事物。

Do you think I should turn down his offer?
你认为我应该拒绝他的报价吗？

2 换用请注意
turn sth /sb away= turn away from sth/ sb
turn sth/sb down= turn down sth/sb