释义：没有平地不变成山坡的，没有去了而不回来的，在艰难困苦中应坚守纯正，必然会有好的结果。

Transparency in our supply chain is key to building trust with customers.

The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.

历史学家必须成为诗人和艺术家，才能赋予过去枯骨以生命。