SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING Hydraulic power systems al so have some drawbacks. Hydraulic oils are messy. Leaks drawback欠缺 are inevitable. The great lubricity of most hydraulic oils makes leaks and spillage very inevitable hazardous. Certain oils are excellent‖不可避免的 removers of paint and electrical insulation.spillage溢出 Hydraulic systems, particularly the high insulation绝缘 performance servo systems which use hydraulic power so efficiently, are extremelyvulnerable脆弱的 vulnerable to dirt and contamination. They contamination must constantly be watched to prevent the污染 addition or generation of contamination and hydraulic systems need expensive filtration filtration it rne to keep them cleanSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING Hydraulic power systems also have some drawbacks. Hydraulic oils are messy. Leaks are inevitable. The great lubricity of most hydraulic oils makes leaks and spillage very hazardous. Certain oils are excellent removers of paint and electrical insulation. Hydraulic systems, particularly the high performance servo systems which use hydraulic power so efficiently, are extremely vulnerable to dirt and contamination. They must constantly be watched to prevent the addition or generation of contamination and hydraulic systems need expensive filtration to keep them clean. drawback 欠缺 inevitable 不可避免的 spillage 溢出 insulation 绝缘 vulnerable 脆弱的 contamination 污染 filtration 过滤