Caps are an essential part of a winter collection.

在冬天的单品中，帽子具有十分特殊的作用。

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An essential part of nursery management is planning the production schedules and data collection.

苗圃管理的主要部分就是进行生产时间表和数据收集的计划。

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Pollen is an essential food source for the hive and its commercial collection is restricted by the bees' needs.

花粉是蜂箱里所必需的食物源，它的商业性收集受制于蜜蜂对花粉的需求。

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Tailoring was an essential element of the collection.

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Each had carefully researched the piece and felt it would be an essential component for their permanent collection.

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That kind of military intelligence collection and analysis is an essential national security function.

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