至今

至今

"至今" means "to this day" or "until now."

至今 is used here to indicate the culmination of an ongoing activity that persists to the present time.

他从小练习钢琴，至今已经演奏了上百场音乐会。

He has practiced piano since childhood, and to this day has performed in hundreds of concerts.

至今为止 emphasizes the current point in time as the reference for the action described.

至今为止，我还没有收到他的回复。

Up to now, I have not received his reply.

至今 highlights the continuation of a condition or impact from the past into the present.

这本书的内容至今仍然引起学术界的热议。

The content of this book to date still sparks active discussion in academia.