"The more we learn, the more amazed we are by the wealth of essential substances they contain," Van Horn continues, "and how they interact with each other to keep us healthy."

“我们了解得越多，就越惊讶于它们所包含的如此丰富的人体所需基本物质，” 范·霍恩继续说道，“以及它们如何通过相互作用来维持人体健康。”

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Keep the machine dry. And mineral substances in rainwater, humidity and other liquids may corrupt its precise parts.

仪器要时刻保持干燥，雨水、湿气和液体含有矿物质，会腐蚀精密部件。

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Nongda 15440 can keep the higher dry substances accumulation at drought stress and had stronger resistant ability to drought stress, but Nongda 15404, 15416 had more sensitivity to drought stress.

在干旱胁迫下，15440仍能保持相对较高的干物质积累量，对干旱胁迫有较强的抵抗能力，而农大15404、15416对干旱胁迫反应更为敏感。

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The program provides a two-category drug system in an attempt to draw a clear line between therapeutic medications and banned substances in an attempt to keep horsemen from being punished for legal medications that remain in a horse's system before a race.

WSJ: Calif. horse owners want multi-state doping rules

Even the police admit that new substances now enter the market faster than the authorities can keep up.

ECONOMIST: Cocaine is cheaper, but weaker