我绝不是这个领域的专家，但我愿意学习。

I am ___not ___by ___any ___means an expert in this field, but I'm willing to learn.

为这个复杂问题找到解决方案绝非易事。

Finding a solution to this complex problem is ___by ___no ___means straightforward.

转行到新的职业绝非易事，但最终是值得的。

The transition to a new career was ___by ___no ___means easy, but it was ultimately rewarding.