物理上，特别是量子场论中，物理系统的满足经典运动方程的位形称为在壳的，而其它的则称为离壳的。费曼图中和内部传播子相关的虚拟粒子通常允许离壳，但该进程的幅度通常随着远离壳而减小；传播子通常在质量壳上有奇异点。
分离壳 Separate shells
离壳型 apopheredermes
离合器轮壳 clutch boss ; clutch chief
离合器外壳 Clutch Case ; english Clutch Case ; OUTER CLUTCH ; Dlutch Dase
内壳电离 inner shell excitation ; inner shell ionization ; shellionization
离合柒壳 clutch housing ; clutch casing
在壳和离壳 On shell and off shell
离合器壳体 clutch housing ; clutch case
对于未加规范条件的杨-密耳斯理论，提出了SU(2)规范场一种新的离壳分解。
A new off shell decomposition of SU (2) gauge field without any gauge fixing is proposed.
霁天捧著胸口，不敢再回头，慢步走向房间中央，发著抖，将残页收集好的绝离壳从虫洞之笼捡了出来，放在地上。
Ji days filled their chest, not back, Manbu room to the central and Fazhaodou, page collection of residual good will must shell from the wormhole from the cage haul out on the ground.
选用皱壳棉实生苗的微繁殖系幼枝和茎的节段作为诱导离体开花的外植体。
Shoots and stem nodes of the micropropagated clones of Gossypium costulatum were used as explants, which were cultured to flowering in vitro.
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