| 单词 | 减少摩擦 |
| 释义 | 〔lubricant〕A substance, such as grease or oil, that reduces friction when applied as a surface coating to moving parts.润滑剂：一种象油脂或汽油的物质，被擦在运动部分表面时可减少摩擦〔washer〕A flat disk, as of metal, plastic, rubber, or leather, placed beneath a nut or at an axle bearing or a joint to relieve friction, prevent leakage, or distribute pressure.垫圈：用金属、塑料、橡胶或皮革等制的平的圆盘状物，放于螺钉下或轮轴处或连接处以减少摩擦，防止渗漏或均衡压力 |
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