high-speed
/ˈhaɪˈspiːd/adjective
1- moving, operating, or happening very quickly高速的：
high-speed travel.
高速行进。
1.1
- (of photographic film) needing little light or only short exposure（胶卷）高速的。
1.2
- (of steel) suitable for drill bits and other tools that cut so fast that they become red-hot（钢）高速的, 坚韧的（适合做钻孔机钻头等高速切割工具的）。