见异思迁的英文：
[Literal Meaning]
see/change/think of/move
to change one's mind the moment one sees something new

[解释]
看见另一个事物就想改变原来的主意。指意志不坚定，喜好不专一。

[Explanation]
to be inconstant or fickle

[例子]
如果你喜欢上了哪个男生就不要见异思迁。

[Example]
If you fell in love with a boy, don't be like a rolling stone.

[英文等价词]
like a rolling stone

In work, one mustn't pick and choose or change one's mind the moment one sees something different.
对工作不应见异思迁，挑挑拣拣。