not know where to begin

But she did not know where to begin.

但她不知从何干起。

Give me a balance sheet and I would not know where to begin.

但给我一份资产负债表，我却不知该从何下手。

For organisations that are beginning to look at this type of work, it's not always easy to know where to begin.

那些开始考虑这类工作的组织并不总是能轻易地知道应该从何处着手。

If you're not an avid reader it can be hard to know where to begin.

当然，如果你还未养成长期深度的阅读习惯，一开始可能不太清楚从哪个部分开始。

We can say, the role in nature of the plant is essential, there are no plants, the living beings do not almost know where to begin.

可以说，植物在自然界中的作用至关重要，没有植物，生物几乎就无从谈起。