由于害虫有巨大的繁殖潜力和基因多样性，许多害虫被认为能够抵抗合成化学物质，而且生育的后代对杀虫剂具有内在的抵抗力。
Because of their tremendous breeding potential and genetic diversity, many pests are known to withstand synthetic chemicals and bear offspring with a built-in resistance to pesticides.
水热合成釜是在一定温度、一定压力条件下合成化学物质提供的反应器。
Hydrothermal synthesis reactor is in a certain temperature and pressure conditions, certain synthetic chemical reactor provided.
现在，有几种天然防晒成分已经买不到了，而只用人工合成化学物质显然是没法达到足够的防晒指数的。
Except that a couple of the originals have disappeared from sale, apparently unable to provide sufficient SPF without help from man-made chemicals.
近年来，随着人工合成化学物质大量进入环境，现已在环境中发现了新的适应性的细菌对有机污染物的代谢机制。
Recently, as the introduction of artificial synthetic chemicals into environment, it has been found that catabolic mechanism in newly adapted bacteria to organic pollutants in environment.
同时外界的因素也会产生自由基如抽烟环境污染还有那些添加在饮用水和食物里的人工合成化学物质。一些使你延缓衰老和更长寿的方法。
Free radicals also come from outside sources, such as smoking, environmental pollution, and synthetic chemicals that are added to our water and food. Some tips for living longer and anti-aging.
胶剂大多是合成化学品，这些化学物质让橡胶易于咀嚼。
Gum base is made mostly of synthetic chemicals, and these chemicals give gum its chewy property.
胶剂大多是合成化学品，这些化学物质让橡胶易于咀嚼。
Gum base is made mostly of synthetic chemicals, and these chemicals give gum its chewy property.
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