conserve one's vitality [strength];
保存精力
preserve one's strength; conserve one's forces;
保存实力
I'm not sure why it's not S for save but it's write out and that means save.
我也不明白为什么不用S代表“保存“而是用“写出“,“写出“也就是“保存“啦。
哈佛公开课 - 计算机科学课程节选
and it's wonderful that it was saved
它能被保存下来真是太好了,
中央车站的历史 - SpeakingMax英语口语达人
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