Council on Smoking and Health香港吸烟与健康委员会 Committee for Occupational Safety and Health职业安全与健康委员会 Hyperbolic Co-SineCo-Sine双曲 Control of Substances and Hazards控制物质和危险 Committee on Occupational Safety and Health职业安全与健康委员会 Hyperbolic Cosine双曲余弦 Council for Occupational Safety and Health职业安全与健康委员会 Committee on School Health委员会在学校的健康