The cells had been frozen and thawed out before being used, to simulate the conditions they would be kept in if stored for human patients.
干细胞在使用前都事先经过冰冻和解冻处理，以模拟用于人类目的的干细胞的存放条件。
He advises patients who are having trouble with bowel movements to place something under their feet while seated on the toilet, as this helps to simulate the squatting position.
他建议排便有困难的患者坐在马桶上时，在脚下垫点儿东西，因为这样有助于模拟蹲着的姿势。
He advises patients who are having trouble with bowel movements to place something under their feet while seated on the toilet, as this helps to simulate the squatting position.
他建议排便有困难的患者坐在马桶上时，在脚下垫点儿东西，因为这样有助于模拟蹲着的姿势。
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