X射线和其他的射线可以杀死细胞，这些射线以近端和远端的淋巴结为目标，瞄准在骨头里、肺里和脑里扩散的继发肿瘤（转移瘤）。
X-rays and other forms of radiation were known to kill cells and these were aimed at lymph glands near and distant, on sites of secondary cancer spread in bone and lung and brain.
系统包括三个部分：原发肿瘤的扩散程度(t)；淋巴结的转移程度(N)和是否有了其他器官的转移(M)。
The system is based on the spread of the primary tumor (t), the extent of lymph node involvement (n), and the presence or absence of metastases (m).
在许多情况下，肿瘤的转移和扩散到其他部分的动物。
In many cases, the tumors metastasized and spread to other parts of the animals.
但由于肝肿瘤手术会造成患者机体组织的损伤和气血损耗，使患者体质虚弱，容易导致肿瘤症的复发、肿瘤细胞的扩散和转移。
But because of patients with hepatic tumor surgery can cause body tissue damage and loss of blood, frail patients, easy to cause the tumor recurrence of the spread of cancer cells, and metastasis.
细胞就能更快速地改变成一个更具侵袭性的形状而穿透周围组织，这是肿瘤更易扩散和可能形成转移的关键一步。
The cell can change more rapidly to a more aggressive form and penetrate surrounding tissue, a crucial step toward increased spreading of the tumor and the possible formation of metastases.
细胞就能更快速地改变成一个更具侵袭性的形状而穿透周围组织，这是肿瘤更易扩散和可能形成转移的关键一步。
The cell can change more rapidly to a more aggressive form and penetrate surrounding tissue, a crucial step toward increased spreading of the tumor and the possible formation of metastases.
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