Chantelle's assertiveness stirred up his deep-seated sense of inadequacy.

仙黛尔的坚定自信激起了他根深蒂固的自卑感。

Assertiveness is a learned skill.

自信是一种学习技巧。

What, then, accounts for China's new assertiveness?

那么，中国新的坚定表现在哪里呢？

But the real foundation of their new assertiveness is economic.

但它们新生自信的真正基础来自经济。

Balancing these two characteristics is the essence of assertiveness.

平衡这两个特点是自信的本质。