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。 Traders can purchase or sell these contracts, aiming to make the most of price tag fluctuations. The futures value reflects current market expectations for the longer term worth of oil. but no, the biggest big difference as well as one which will get you embarrassed (or even https://yeepdirectory.com/listings13241258/soothing-massage-at-your-doorstep-fundamentals-explained