待我幼稚完便不在让你为难
[dài wŏ yòu zhì wán biàn bù zài ràng nĭ wéi nán]
Roughly translated to mean, 'After I am no longer childish, I won't make you uncomfortable anymore.' This implies someone is aware of their childish nature but assures others that they will mature with time, and hence reduce discomfort caused by them.