This collateralcontract can be proved by evidence extrinsic to the main written contract.
后一个并行合同可以通过与主书面合同有关的外在证据得以证实。
2
Venture capital to a large extent based on mutual trust, the venture capital is no secured, no collateral, and must be fully in accordance with the contract.
风险投资的基础在很大程度上是相互信任，风险资本是无抵押，无担保，并且必须完全按照该合同。
3
As the essential obligation in contract law system, the Collateral obligation is developed on the basis of good faith.