知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 IPXIPX 1,26933 gold badges1010 silver badges1919 bronze badges one I should disagree: I believe your introduction of the challenge doesn't suggest that you're destined to be launched to the challenge, it only suggests the latter: you are going to be introducing the situation to Other people. 这个其实是欧拉公式，其中 https://www.ecom-group.com/training-events/sap-cloud-integration-suite-cld900/