词汇	gear step
释义	gear step ɡiəstep齿轮速比差
随便看	perinatal center Perinatal child perinatal complication perinatal correlate perinatal cutaneous hemorrhage Perinatal cyanotic attacks perinatal death perinatal death rate perinatal difficulty perinatal disease perinatal disorder of digestive system perinatal environment perinatal factor Perinatal factors Perinatal fetal perinatal fetus Perinatal fetus outcome perinatal gastrointestinal hemorrhage Perinatal health Perinatal health care perinatal healthcare quality perinatal heart disease perinatal hypothyroidism perinatal infant perinatal infants