The thermos, with the lid on top, It's not a open system your coffee is going to stay warm or hot in the thermos.
顶部盖了盖子的热水瓶,不是开系,你希望你的咖啡在热水瓶里面保持温暖,或滚烫。
system is the opposite of the open system, no mass and no energy can flow through the boundary.
孤立系与开系正相反,没有质量或能量,能流过它的边界。
He is riding from the ships or wherever he is from the camp to the battlefield.
他们开着战车从任何地方,船或营地一路到达战场
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