Para.3 Plants absorb carbon dioxide and convert it into their own tissue,which serve as the basic food supply for all of animal life. 必 convert:vt. 1)change from one form or use to another (使)转变，转换 e.g.Coal can be converted to gas. I want to convert some dollars into pounds Para.3 ❖ Plants absorb carbon dioxide and convert it into their own tissue, which serve as the basic food supply for all of animal life. ❖ convert: vt. ❖ 1) change from one form or use to another （使）转变，转换 ❖ e.g. Coal can be converted to gas. ❖ I want to convert some dollars into pounds