protraction

n.

伸长，制图，延长；

1. Further protraction of the discussion will not achieve anything.
   继续讨论下去并不能解决任何问题。

Maxillary protraction: treatment and posttreatment effects
The effectiveness of protraction face mask therapy: a meta-analysis.
Clinical results of the maxillary protraction in Korean children.
Osseointegrated titanium implants for maxillofacial protraction in monkeys.
Assessment of skeletal and dental changes by maxillary protraction ☆ ☆☆ ★ ★★
The effects of maxillary protraction therapy with or without rapid palatal expansion: A prospective, randomized clinical trial
Rhythmic whisking by rat: retraction as well as protraction of the vibrissae is under active muscular control.
Sagittal changes after maxillary protraction with expansion in class III patients in the primary, mixed, and late mixed dentitions: ...
Commentary 2 to Cox and Little: radiation-induced oncogenic transformation: the interplay between dose, dose protraction, and radiat...
Evaluation of isokinetic force production and associated muscle activity in the scapular rotators during a protraction-retraction mo...