External radiation therapy USES a machine outside the body to send radiation toward the cancer.
外部辐射疗法是用体外的机器向癌症进行辐射。
The therapy group was treated with external direct current cardioversion.
治疗组20例，给予体外同步直流电复律治疗；
The therapy group was treated with external direct current cardioversion.
治疗组20例，给予体外同步直流电复律治疗；
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