and so on的意思是诸如此类，依此类推，等等
其同义词主要有：
①and the like
等等，依此类推
②and so forth
等等
③so on and so forth
等等
④or whatever
之类的
⑤etcetera
n. 等等；附加物；附加的人；以及其它
You need energy to move your arms around and move around mechanical systems, obviously, cars, boats, etcetera.
你需要能量,来移动胳膊和走动,机械系统，汽车，船等等。
