街头帮派以记号标示他们的地盘，作为对敌对帮派和警察的警示。
Street gangs marked their territory with symbols – warnings to rival gangs and the police.
浆细胞所产生的抗体附着于产生抗体的细胞，标示毁灭的记号。
Antibodies produced by plasma cells bind to antigen-bearing cells, marking them for destruction.
浆细胞所产生的抗体附着于产生抗体的细胞，标示毁灭的记号。
Antibodies produced by plasma cells bind to antigen-bearing cells, marking them for destruction.
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