absorbing at surface的用法和样例：
- As the mud column gets heavier, less and less gas is detected at surface.
- By means of our some knowhow, our plano-convex blanks have good concentricity and consistency at surface processing.
- Cracks leading to spalling were initiated at surface defects and boundaries between nitriding layes and the core.
- The Emit Trail at Surface Intersection compound emits particles from the point at which the emitter intersects with another object.