The boy always _____a blue heat.

男孩常带一顶蓝帽。

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Blue-NG, the joint venture developing the UK projects, aims to reduce costs by combining the turboexpander with a combined heat and power (CHP) engine, which generates both electricity and heat.

Blue - NG，一家开发英国项目的合资公司，打算使用搭配涡轮放大器的同时，搭配上能产生电和热的热电联产发动机，从而达到削减成本的目的。

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This hardly ever happens out of the blue: there are usually warning signs such as noise, vibration or heat.

机器是不可能突然故障的：通常机器在故障前会有告警信号，例如噪音、振动或发热。

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After digging into the sand between the crossties, it jammed between two of the spokes, went blue from the heat and tension at the point of flexion, and brought the car to a stop.

NEWYORKER: Among Animals and Plants

Windows with the shutters and curtains closed show up in the images in a deep blue colour, demonstrating little heat is escaping.

BBC: Shutters and curtains 'act as double glazing'

While ice reflects around 80 percent of the sun's heat, having a cooling effect, blue sea water can absorb up to 95 percent of solar radiation, warming up the sea and accelerating the melting process further.

CNN: Arctic melt worse than predictions