把烤盘关掉，让余热把混合物再煨一下。Turn the hotplate off and allow the residual heat to keep the mixture simmering.介绍了一种用于铁合金电炉余热回收的热管降温器.Introduce a find of heat - pipe temperature reductioner used to waste energy recovery.热管空气预热器是一种重要的...
Many school buildings are unsafe, and some are falling apart.许多校舍不安全，有些简直是摇摇欲坠。Dangerous undertows make swimming unsafe along most of the coastline.由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。Critics claim the trucks are unsafe.批评家声称这些...