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| English | Chinese |
| cut-off diameter | 波导管临界直径 |
| off-gas cleanup system | 废气净化系统 |
| off-peak commuting Traveling back and forth regularly over some distance, outside of the hours of maximum traffic frequency | 非高峰时间通勤 (交通高峰时间之外的定期地来回行驶。) |
| off-peak travelling Relating to travelling outside rush-hours to avoid overcrowding in public means of transport | 非高峰时间旅行 (高峰时间外的旅游，以避免公共交通的拥挤。) |
| off-peak working | 非高峰时间工作 |
| off-site Activities taking place or located away from the site | 不在现场 (远离发生或现场的活动。) |
| write-off Accounting procedure that is used when an asset is uncollectible and is therefore charged-off as a loss | 注销 (当资产无法收回而作为亏损销账时使用的会计程序。) |