Bravery is more like a trait or an instinct. A brave person is a person who sees a dangerous situation and immediately reacts bravely without thinking.

bravery(勇敢)更像是一种特质或本能。一个勇敢的人是一个人看到危险的情况，并立即作出勇敢的反应，不需要思考。

Courage, on the other hand, is seeing a situation or a dangerous or scary experience and acting, even though you're scared.

另一方面，courage(勇气)是看出一个情况或危险或可怕的经历，并采取行动，即使你害怕。

Courage is when a person acts despite being afraid.

courage（勇气）是一个人在害怕的情况下仍然行动。
Courage: the ability to do something that frightens one.

courage勇气:做使人害怕的事情的能力。

Bravery is when a person acts without being afraid.

bravery（勇敢）是指一个人做事情时没有畏惧。

brave & courageous：

Someone who is brave is willing to do things that are dangerous, and does not show fear in difficult or dangerous situations. 一个brave（勇敢的）人愿意做危险的事情，在困难或危险的情况下不表现出恐惧。

brave: ready to face and endure danger or pain; showing courage.

brave勇敢的:随时准备面对和忍受危险或痛苦;显示勇气。

例：

He was not brave enough to report the loss of the documents.

他当时不够勇敢去报失文件的丢失。

Someone who is courageous shows courage. 勇敢的；有勇气的

例：

The children were very courageous.

孩子们都很勇敢。