限制海洋酸化，在其对世界海洋——和人类——所依靠的食物链造成不可逆转的伤害之前，刻不容缓。
Time is running out to limit acidification before it irreparably harms the food chain on which the world's oceans—and people—depend.
一旦某种风险真的发生，往往会给供应链造成不可逆转的损害和巨大的损失，甚至导致供应链的彻底断裂。
Once some certain risk really happens, it will cause huge damage and incalculable loss, even thorough disruption of supply chain.
因此，在我们的马氏链模型下，布朗马达中的定向粒子流只能在非平衡，也就是不可逆的系统中出现。
Hence, in our model of Markov chains, the directed transport phenomenon of Brownian motors can occur only in nonequilibrium and irreversible systems.
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