nano

Scientists are developing nano-sized robots that can deliver medicine directly to cancer cells.

(Chinese) 科学家们正在开发纳米级的机器人，可以直接向癌细胞输送药物。

The surface was coated with a nano-layer of protective material to prevent scratches.

(Chinese) 表面涂有一层纳米级的保护材料以防刮花。