— used to say that the future or success of someone or something depends on another person or thing成败（取决于）
We (will) stand or fall by their decision. [=their decision will control what happens to us]我们的成败取决于他们的决定。
Our company will stand or fall on our ability to make better products than our competitors. [=our success or failure depends on our ability to make better products than our competitors]公司的成败取决于我们是否有能力生产出优于竞争对手的产品。