There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
These are just a few of the people involved. Many more Recursers contributed ideas, tested hardware, playtested games, and helped shape the project along the way.
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回过头来看，两次战略调整背后，是魅族从“硬件制造商”到“生态服务商”的定位转变。此前的转型是加法，拓展场景守住硬件基本盘。
（二）救助款项，是指依照本章规定，被救助方应当向救助方支付的任何救助报酬、酬金或者补偿。