1. The spread of cancer cells from one part of the body to another is called metastasis.
癌细胞从一个部位扩散到另一个部位被称为转移性。

2. The metastasis of Western cultural influences into Eastern societies has both positive and negative impacts.
西方文化影响向东方社会的传入既有正面影响也有负面影响。

3. According to Freud, the process of dream interpretation involves the metamorphosis and metastasis of hidden desires and symbols.
根据弗洛伊德的理论，解梦过程涉及到隐藏的欲望和象征的转化与转变。