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会员注册今日单词：
| 单词 | 中文释义 | 英文释义 | 例句 |
| upkeep | 维护，维护费（名词） | (noun) The care and maintenance of equipment or property needed to keep it useful; also, the expense of such maintenance (NOTE: often followed by "on") | EXAMPLE: The upkeep on our old equipment was so high that we realized it would be cheaper to replace it with all new equipment. 我们的旧设备的维护费太高，我们意识到改用新设备会更经济。 |
今日短语：
| 短语 | 中文释义 | 英文释义 | 例句 |
| to opt out of something | 决定不参加 | To choose not to participate in something | EXAMPLE: The boss was exhausted but she knew she could not opt out of the big annual company party. 老板筋疲力尽，但她知道她不能缺席公司这场一年一度的盛大聚会。 |