单词	勿怕難
释义	同DO
随便看	zero current zero-current bipotentiometry zero-current chronopotentiometry zero-current potentiometric titration zero-current potentiometry zero-current switching zero curtain zero curvature zero curve zero-cut crystal zero cutout zero date zero-day attack zero-day exploit zero deadband zero decrement zero-decrement zero defect zero-defect zero defect management zero defect program zero defects zero defects program zero defects(zd) zero defect，zd