One reason understanding yourself can be so difficult depends on your actual level of skill.

了解自己之所以如此困难，其中一个原因取决于你的实际技能水平。

When they sent all those people up onto the roof, no one knew exactly the actual level of radiation.

当这些人奉命上屋顶清理时，没有人知道实际辐射值是多少。

From its allies and Europe and Canada to its partners in the Middle East. The actual levels of support differ from country to country.

从欧洲和加拿大的盟友再到中东的合作伙伴，每个国家对对抗ISIS组织的方式也有着天壤之别。

But it is not capable of telling us what determines the actual level of employment; and on the problem of involuntary unemployment it has no direct bearing.

但它无法告诉我们是什么决定了实际的就业水平；对于非自愿失业问题，它没有直接影响。