On the basis of an analysis of fluidized-bed boiler dynamic performance the authors have designed a simplified model after consulting a self-adaptive SPC dual-ring selective system.

在对沸腾燃烧锅炉动态特性进行分析的基础上，设计了一种简便的模型，参考自适应SPC双环选择性系统。

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However, the Selective Service System remains in place as a contingency plan; men between the ages of 18 and 25 are required to register so that a draft can be readily resumed if needed.

然而，选征兵役制作为意外事故防范计划还保留着。 法律规定年纪18-25的公民必须进行登记注册，以备紧急需要时能迅速恢复义务兵役。

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The selective accretion theory chalks it up to high gas density in the early solar system, during the planet's formation.

选择性附加理论写出它的高气体密度在早期太阳系，在行星的形成。

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But Mr Jarman said that although the vocational training was impressive in quality, there was little to suggest that the UK should import such a selective system.

BBC: Tories revise schools policy

There are more than 160 grammar schools left across England - the remainder of a selective system scrapped in most parts of the country in the 1960s and 1970s.

BBC: Kent considers 'new' Sevenoaks grammar school

After promotion to lead the whole education portfolio he went on to attack Labour's grammar school policy, calling the selective system "as divisive as it is archaic" and telling MPs how 11-plus exam failures - including his brother - suffered for life.

BBC: Phil Willis: Education & Employment