See means to notice or become aware of (someone or something) by using your eyes.
See的意思是用眼睛注意到或意识到(某人或某物)。
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.