... 只需体能训练 Just Needs Conditioning 肌力与体能训练 physical fitness ; General fitness ; Level of conditioning ; Health and fitness 体能训练服 PT uniform ...
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level of conditioning
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以上为机器翻译结果，长、整句建议使用 人工翻译 。
Heating and cooling experts say central air-conditioning systems should be serviced annually to remove dirt, change filters and check the level of Freon, a refrigerant.
WSJ: Don't Wait to Service AC Units
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