Design the POR for related materials and keep in contact with the supplier.

制作相关材料的申购单，联系供应商并跟进采购单。

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By tracking down people who have been in contact with COVID-19 patients, health researchers can warn them, and keep COVID-19 from spreading further.

通过追踪与新冠肺炎患者接触过的人，卫生研究人员可以提醒他们，并阻止新冠肺炎的进一步传播。

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Keep in touch with friends, acquaintances and, colleagues. And don't stop after your initial contact.

和朋友、熟人和同事保持联系。不要在初次联系后就不联系了。

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I think it's in part that, suffering from lupus, she was very much confined to her house in Georgia, and the letter writing, this kind of correspondence, was certainly a way for her to keep in contact with the world of readers and other writers and friends.

我想这多少与她，受病痛的折磨有关，受制于病情，她只能呆在,乔治亚州的家里，足不出户，所以写信，必然是她和读者、,其他作家和朋友联系的方式。

耶鲁公开课 - 1945年后的美国小说课程节选

In repressive countries, the arrival of the internet has often been greeted by citizens as a wonderful way to bypass government control, enabling dissidents to air their views and keep in contact with the outside world.

ECONOMIST: Civil liberties: freedom of speech

The aim is to keep beneficiaries motivated to find work and to keep them in close contact with the job market.

ECONOMIST: The crunch may entrench unemployment

When Alwaleed travels, an advance communications team sets up a private phone network and satellite link, putting him in contact with his office in Riyadh and letting him keep an eye on the Arab TV channels in which he owns a stake.

FORBES: The optimist