在天气较好，风较小的情况下，BP燃烧了十多个受控区域。
On days when the weather is fine and there is relatively no wind, BP conducts up to a dozen "controlled burns", torching vast expanses of the ocean surface within a corral of fireproof booms.
敞开的继电器会使潮湿空气进入切换区域，而密闭继电器从出厂时其内部环境就是受控的。
Open relays allow ambient air into the switching area, while sealed re lays contain a controlled internal environment from the manufacturer.
在美国和欧洲，营养药品处于受控制的边缘区域。
In the US and Europe, nutraceuticals exist in a regulatory twilight zone.
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