The frIt'sealing material is a crucial material in ceramic metal halide lamps.陶瓷金属卤化物灯用封接材料是陶瓷金卤灯的关键材料.The formation of polyhalides depends on the combination of a central halide ion with a halogen.多卤化物的形成取决于中心卤化物离子...
A congressional report charges that federal safety laws were recklessly violated.一份国会报告指责联邦安全法被公然违反。Seventeen congressmen were absent at the Congressional roll call.议会点名时有17名议员缺席.The Congressional Budget Office says the ...