if only什么意思解释？

if only的音标：if only的英式发音音标为：[if 'əunli]if only的美式发音音标为：[ɪf 'onli]...

If only he would hold her close to him.要是他能将她拥入怀中就好了。If only you had told me that some time ago.要是你早些时候告诉我该多好啊！Listen to us, if only this once.听我们的吧,哪怕就这么一次....