Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.
研究这种药草的农学家发现，它会产生大量的组氨酸，这种氨基酸在试管溶液中会使这些金属具有化学惰性。
Coffee has large amounts of antioxidants such as chlorogenic acid and tocopherols, and minerals such as magnesium.
咖啡中含有大量抗氧剂例如绿原酸酸和维生素e和矿物质，例如镁。
This process had some advantages, such as high yield, high product quality, low cost and no large amounts of waste sulfuric acid.
此种方法合成四氯苯酐具有产品产率高、质量好、成本低且不产生大量废硫酸的优点。
But traditional Friedel-Crafts reaction has its own limitations, such as requirement of a stoichiometric amount of Lewis acid catalysts and large amounts of undesired products.
传统的傅克反应的局限性在于，需要等量的路易斯酸催化剂和产生大量的副产物。
But traditional Friedel-Crafts reaction has its own limitations, such as requirement of a stoichiometric amount of Lewis acid catalysts and large amounts of undesired products.
传统的傅克反应的局限性在于，需要等量的路易斯酸催化剂和产生大量的副产物。
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