How do I put on the respirator and check for proper fit?

如何佩戴防护口罩并检验适合性？

youdao

As with any body armor, proper fit is EXTREMELY important.

正如任何防弹衣，适当的配合是十分重要的。

youdao

Adjustable instep strap ensures a personalized and proper fit.

可调脚背表带保证了个性化的和适当的配合。

youdao

There are probably aspects of it that are not entirely fit and proper.

摇滚中有一些地方,很可能与艺术并不完全相称。

普林斯顿公开课 - 人性课程节选

But the fact is that I'm sure there are a few people - - thay may be more than a few in the facility - who do feel that rock and roll is not exactly what one says fit and proper.

不过事实上，我相信,在学校里确实有许多人-,认为摇滚和艺术,并不完全相称。

普林斯顿公开课 - 人性课程节选

She expects quality, proper fit and a rich assortment that she can choose from.

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Such a figure requires every corporate Legal Department to consider how it manages its resources and whether LSO is a proper fit for its needs.

FORBES: Legal Services Outsourcing (LSO) -- Maximizing Comparative Advantage

Can Proper QA fit into that routine?

FORBES: Proper QA Are Ready To Help Test Your Mobile Applications