三心二意的英文：
[Literal Meaning]
three/heart/two/mind
with three hearts and two minds

[解释]
又想这样又想那样，犹豫不定。常指不安心，不专一。

[Explanation]
be in two minds

[例子]
韩亮在上班的时候总是三心二意的，对此同事们经常抱怨。

[Example]
Han Liang was always in two minds at work and his colleagues often complained about this.

Provided the dunce have persistency and application,he will inevitably head the clever fellow without those quality.
持之以恒、专业致志的笨人必然胜过有始无终、三心二意的智者。

He cleaned out both open foes and lukewarm friends in the old cabinet.
他清除掉了旧内阁中的公开反对者和三心二意的朋友。

Undecided;many-minded;hesitant
三心二意

Shaky voters
三心二意的投票者

Don't be so absent-minded.
不要三心二意。

To move or think erratically;vacillate.
反复无常变化无常地移动或思考;三心二意，犹豫不决

The first dubious snow had filtered down
头一场雪仿佛三心二意似地飘落。

Let not your wits go wool-gathering.
莫让你的心思去收集羊毛(勿三心二意)。

It had hardly been a propitious beginning, but he had chosen his course, and would show no swerve
这种情形很难说是一个吉利的开端，但是他已经选定了他的道路了，他不想三心二意。

Like so many of his contemporaries, Twain was not whole-hearted in his praise of industrialism
马克?吐温如同他许多同时代的人一样，在赞扬工业文明的时候有点三心二意。