当威胁被感知到以后，RAS自动选择相关的感觉输入，并将其送进较低的脑(也叫“爬虫的脑”)，那里的非自愿响应不是去思考，而是作出反应-战斗，逃跑，或僵硬地呆立不动。
When threat is perceived, the RAS automatically selects related sensory input and directs it to the lower brain where the involuntary response is not to think, but to react-fight, flight, or freeze.
设计该药物能够选择性抑制糖代谢相关蛋白而不作用与其他生物反应密切相关蛋白。
The medicine was designed to selectively inhibit the protein associated with glucose metabolism but not other closely related proteins that are associated with other biologic activity.
结果表明：天然气在氮热等离子体中热解反应强烈，其转化率主要由输入功率和甲烷流量决定，产品的选择性亦即乙炔的收率与反应器的结构密切相关。
Results show that the conversion rate of methane is mainly determined by plasma power and methane flow rate, the product selectivity is sensitive to reactor configuration.
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