在国内有很多非常优秀的社交平台，包括微博、知乎、小红书、豆瓣等；而在国外也有很多非常好玩的社交平台，比如： Excellent: WTI Is considered a "light-weight sweet" crude oil, which can be easier to refine, although Brent is a mixture of crude oils, such as both of those "mild sweet" and "significant bitter" grades. WTI and Brent oil futures could be suitable for specific buyers, Neverthele... https://maps.app.goo.gl/P1bpUsmeUaLR4VbG6