以下为句子列表：
英文: With using once artificial freezing method and natural freezing method test the compressive strength of low-temperature concrete at different age and by testing the loss percentage of water (content of evaporative water) of saturated specimen test the por
中文: 方法采用恒低温一次冻结法和自然变低温多次冻结法，测定混凝土在不同龄期的强度值，利用可蒸发水含量法测定对应龄期的孔隙率。
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英文: -80℃ freezer-liquid nitrogen freezing method for cryopreservation of cord blood hematopoietic stem cells
中文: -80℃冰箱降温-液氮冻存脐血造血干细胞
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英文: AN EFFECT OF THE TWO-STEP FREEZING METHOD ON THE SCHWANN CELL BIOLOGICAL ACTIVITY IN THE PERIPHERAL NERVE OF THE RAT
中文: 两步冷冻法对周围神经雪旺细胞生物活性的影响
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