For example:

　　I saw you waving at me.

　　我看见你朝我挥手。

　　I see a ship on the horizon.

　　我看见地平线上有一艘轮船。

　　Of note, to see can also mean to understand (e.g., I see what you mean).

　　注意，see也可以表示理解(比方说，我知道你说的是什么意思了。)

　　LOOK

　　The verb to look means to deliberately apply the ability to see. In other words, it means to make a conscious effort to see something. To look is usually followed by at or for.

　　动词“look”的意思是有意识地运用“see”的能力。换句话说，它的意思是付出努力或注意力的去看某物。一般后边跟at或者for。

　　For example:

　　Look at the beading on her wedding dress.

　　看她结婚礼服上的珠饰。

　　I am looking for my car keys.

　　我在找我的车钥匙。(需要用眼睛看着找)。

　　WATCH

　　Watch means to look at (someone or something) for an amount of time and pay attention to what is happening.

　　watch的意思是看(某人或某事)一段时间，注意正在发生的事情