They may have to deploy or displace under fire or on short notice, so it is imperative that the crew be familiar with the process.

他们可能必须在枪林弹雨下或接到命令后立即部署或解除部署，所以队员们熟知这些过程将是相当必要的。

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The author argues that it is imperative to institute a yearly salary system for the managers in geological prospecting units, even though there may be some difficulties.

文章认为，对地勘单位经营者实行年薪制有一定的困难，但势在必行。

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