1professional knowledge of dies: an electrode include graphite

is that right ?got solecism?

2模句专业知识:电极是用石墨和电解液组成的　
Professional knowledge of dies: an electorde is made up of electrolytes and graphite.

3昨晚我被蚊子咬了眼睛.到现在还是肿的
the mosquito bit my eye ,so the eye is swollen to now.
the mosquito bit my eye ,so this eye is swelling now .
the mosquito bit my eye ,so this eye has been swelling .

If all wrong. please help me to fix them .

thank you very much