Clarinet When I played with a symphony orchestra, our union reached anagreement with a major airline about which instruments we could carry on board, and which had to be shipped as luggage.
If you don't first have anagreement to cancel some or all implied promises and you still enter the contract or matter, then you must reliably carry out each and all of them.
如果事先没有立约取消就参与了合约、事情，那么就必须可靠地一一执行所有不言而喻的诺言。
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When I played with a symphony orchestra, our union reached anagreement with a major airline about which instruments we could carry on board, and which had to be shipped as luggage.