But if the puzzle is so huge, so difficult and so complicated that I can barely think it's doable, I need a strategy.

如果这个拼图很大、很难、很复杂，让我都不知道如何是好，这时候，我就需要一个策略了。

youdao

But if the puzzle is so huge, so difficult and so complicated that I can barely think it's doable, I need a strategy.

如果这个拼图很大、很难、很复杂，让我都不知道如何是好，这时候，我就需要一个策略了。

youdao