Other immune cells carry molecular keys or ligands named PD-L1 orPD-L2, which can flipthat switch to protect normal tissues from collateral damage.
其他免疫细胞携带有PD-L1 或PD-L2的分子键或配体,它们能够保护正常的组织免于附带损伤。
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And there it was -myspace was growing at the exact time we all had cheap digital cameras, smartphones with cameras and new, cheap video cameras like the Flipthat allowed us to create video.
And there it was - MySpace was growing at the exact time we all had cheap digital cameras, smartphones with cameras and new, cheap video cameras like the Flipthat allowed us to create video.