第三，质量要符合要求 meaning in English
firstly, we must pay much attention not to spill the oil
fourthly, we must take samples during bunkering
secondly, the quantity to the oil must correspond to the contract
Examples
- Firstly , we must pay much attention not to spill the oil ; secondly , the quantity to the oil must correspond to the contract ; thirdly the quality must comply with the required one ; fourthly , we must take samples during bunkering
首先，我们要严防跑油；第二，加油的数量要与合同相符；第三，质量要符合要求；最后，加油过程中我们要连续地取油样。