Option b: Use synthetic objects for intermediate facts.
选项b:使用中间事实的合成对象。
2
One option, ironically, is to use carbon dioxide to replace the synthetic HFC refrigerants used in such systems, he says: such gases can have around 4000 times the global warming potential of CO2.
One possible option in this setting is the off-label use of misoprostol, a synthetic prostaglandin E1 analogue licensed for prevention and treatment of gastrointestinal ulcers.