这不仅是一个巨大的挑战，但也是一个令人难忘的挑战。

This wasn't only a big challenge but also an unforgettable challenge.

youdao

这不仅是一个巨大的挑战，但也是一个令人难忘的挑战。

This wasn't only a big challenge but also an unforgettable challenge.

youdao