单语范例（未经PONS编辑处理）
Stability constants defined in this way, are "association" constants.
en.wikipedia.org They are used at both ends of driveshafts, protecting constant-velocity joints from the ingress of dirt, and retaining the grease.
en.wikipedia.org The following twenty years saw a veritable explosion in the number of stability constants that were determined.
en.wikipedia.org Each group is given a different shielding constant which depends upon the number and types of electrons in those groups preceding it.
en.wikipedia.org The area of the sphere is proportional to, so the total energy passing through the sphere is constant.
en.wikipedia.org