【中文版】

交割日是商品期货交易中的一个重要概念，它指的是期货合约到期时进行实物交割的日期。在交割日，期货合约的持有者需要将实物交割或者进行现金结算。对于原油期货来说，交割日通常是在合约到期月份的最后交易日之前的一段时间。

在交割日之前，投资者需要将手中的期货合约转化为实物或者进行现金结算，因此交割日的到来可能会导致期货价格的波动。在原油市场上，由于原油是一种重要的战略资源，因此交割日的到来对市场的影响更加明显。

在交割日到来时，如果市场上的原油供应量不足，那么期货价格就可能出现暴涨。这是因为在交割日之前，投资者需要持有实物原油，而市场上原油供应的短缺可能会导致原油价格的上涨。此外，如果市场上的原油需求量较大，那么在交割日之前，投资者也可能会将手中的期货合约转化为实物，从而导致原油价格的上涨。

总的来说，交割日的到来可能会导致原油价格的波动，这是因为在交割日之前，投资者需要将手中的期货合约转化为实物或者进行现金结算。此外，市场上的原油供应和需求情况也会影响原油价格的波动。

【英文版】

Delivery date is an important concept in commodity futures trading, which refers to the date when the futures contract is physically delivered or settled in cash upon expiration. For crude oil futures, the delivery date usually falls in the period before the last trading day of the contract expiration month.

Before the delivery date, investors need to convert the physical commodity or cash settlement of the futures contract in their hands. Therefore, the arrival of the delivery date may cause fluctuations in the futures price. In the crude oil market, as crude oil is an important strategic resource, the impact of the delivery date on the market is even more significant.

When the delivery date arrives, if there is insufficient supply of crude oil on the market, the futures price may experience a sharp increase. This is because before the delivery date, investors need to hold physical crude oil, and a shortage of crude oil supply on the market may lead to an increase in the price of crude oil. In addition, if there is a high demand for crude oil on the market, investors may also convert the futures contract in their hands into physical crude oil before the delivery date, which may also lead to an increase in the price of crude oil.

Overall, the arrival of the delivery date may cause fluctuations in the price of crude oil. This is because before the delivery date, investors need to convert the futures contract in their hands into physical crude oil or cash settlement. In addition, the supply and demand situation of crude oil on the market will also affect the fluctuations in crude oil prices.