1. 魏碑心思朗文詞典
        簡(jiǎn)體 繁體

        parts per million

        P 開(kāi)頭單詞

        常見(jiàn)例句

          雙語(yǔ)例句

        • The light reflected by the newfound extrasolar planet, or exoplanet, changed by only about 6.5 parts per million, relative to the brightness of the host star.
          這顆新發(fā)現(xiàn)的太陽(yáng)系外行星——或者稱為外行星——所反射的光線變化相對(duì)于其恒星的亮度只有百萬(wàn)分之6.5。
        • At 250 parts per million CO2, the shellfish grew vigorously, and at 750 ppm and higher they were crippled, feeble creatures with thin shells and weak connective tissues.
          在 CO2 含量為百萬(wàn)分之 250 時(shí),甲殼類(lèi)生物生長(zhǎng)得很好,而到了百萬(wàn)分之 750 或更高時(shí),它們的甲殼變薄、連結(jié)物質(zhì)變?nèi)?,成了殘破而虛弱的生物?/li>
        • They added that concentrations of carbon dioxide, the main greenhouse gas, should be limited to 350 parts per million of the atmosphere -- below current levels of 387 ppm.
          同時(shí)應(yīng)該把大氣中二氧化碳的含量應(yīng)該控制在百萬(wàn)分之350個(gè)單位,目前的含量水平為百萬(wàn)分之387個(gè)單位。
        • 原聲例句

        • The team found levels of lead as high as thirty-two thousand parts per million in tests on some paint samples from Ecuador.
        • Breathing in two hundred parts per million of carbon monoxide will cause the first signs of poisoning.
        • Twelve thousand parts per million of the gas will cause death in one to three minutes.
        • 權(quán)威例句

        • Floating sensors hold the oxygen to between 2 and 2.5 parts per million of water.
          FORBES: Muckraker
        • Floating sensors hold the oxygen to between 2.0 and 2.5 parts per million of water.
          FORBES: Muckraker
        • On average the amount is growing by about 2 parts per million per year.
          NPR: Greenhouse Gas Milestone; CO2 Levels Set Record
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