snap head的相关资料：
临近单词
snapup
snap
snap off timing discriminator
Snapping Objects to each other
snapping of the peroneal tendon
snap-back of axial deformation
snapping back measures the strong
snap-back of lateral deformation
snapped up the introductory offer.
SNAP Standard Network Access Protocol
SNAP System Network Architecture Protocol
Snapshot replication and transactional replication
