形成一层用英语怎么说？

形成一层

例句

• The mercury wicks up the reed and wets the contacts, providing a perpetually self - renewing contact surface. 水银沿簧片渗透并沾湿触点, 形成一层永久性自更新接触表面.
• Thickening and perivascular lymphocytic cuffing of cord blood vessels . H and E X 250. 脊髓血管增粗;脊髓血管周围可见淋巴细胞浸润,形成一层套膜(苏木精-伊红染色,原始放大倍数X250倍).
• Black oxide film was prepared on alloy structural steel by electrochemical method. 采用电化学的方法在合金结构钢表面形成一层黑色氧化膜.