That principle asserts that innovations only truly catch on when two factors connect: One, the new thing works reliably, and two, people understand why they need it. Simply creating a cool new technology is never enough; fail to bring the public along, and you wind up with either weak demand (think Segway) or a backlash (like with nuclear power in the 1980s).
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海证期货指出，本次冲突对伊朗产量及出口产生一定缩量预期，霍尔木兹海峡封闭也使中东地区其他国家尿素出口面临不确定性，短期国际尿素市场价格有望进一步推涨。
dist * 10 + level