In recorded experiments, immune cells called t cells can be seen actively migrating though tissues, making direct contact with tumor cells, and killing them.

已经有实验表明，称为T细胞的免疫细胞能够积极地穿越组织，直接接触肿瘤细胞从而杀死肿瘤细胞。

youdao

Just saying peace won't bring peace. Those who are in direct or indirect contact with the PKK are accomplices to murder.

VOA: standard.2010.06.17

Another subset of T-cells called T helper cells will recognize that signal by direct contact with it, and they will become activated and proliferate.

另外一个T细胞的亚群是辅助性T细胞,辅助性T细胞可识别与其接触的抗原信号,并被激活,开始增殖

耶鲁公开课 - 生物医学工程探索课程节选

Unlike Mr. Abdulmutallab, who traveled to Yemen for instruction from Mr. Awlaki, investigators haven't found evidence of direct contact between the Tsarnaevs and the radical cleric, the U.S. official familiar with the suspect's statements said.

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Prime Minister Victor Ponta said the two Romanian slaughterhouses initially suspected to have links to the horsemeat scandal never had direct contact with Comigel and haven't done anything illegal.

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Without direct contact with the beneficiary, the trustee won't know how best to serve, he says.

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